Wikipedia:WikiProject Mathematics/PlanetMath Exchange/51-XX Geometry

51-00 General reference works (handbooks, dictionaries, bibliographies, etc.)

 * PM: alternate proof of parallelogram law, id=3031 -- WP: none -- Status: N
 * Paul August &#9742; 03:59, 6 May 2006 (UTC)


 * PM: angle bisector, id=3623 -- WP: bisector -- Status: M
 * Jeekc 15:26, 7 November 2005 (UTC)


 * PM: angle sum identity, id=3170 -- WP guess: angle sum identity -- Status:


 * PM: annulus, id=2535 -- WP: annulus -- Status: A
 * Jeekc 15:36, 7 November 2005 (UTC)


 * PM: Apollonius theorem, id=146 -- WP: Apollonius theorem -- Status: C
 * Oleg Alexandrov (talk) 00:48, 2 April 2006 (UTC)


 * PM: Apollonius' circle, id=154 -- WP guess: Apollonius' circle -- Status:


 * PM: Brahmagupta's formula, id=153 -- WP: Brahmagupta's formula -- Status: A
 * Jeekc 15:31, 7 November 2005 (UTC)


 * PM: Brianchon theorem, id=5434 -- WP: Brianchon theorem -- Status: A
 * AdamSmithee 09:37, 4 September 2007 (UTC)


 * PM: Brocard theorem, id=5483 -- WP guess: Brocard theorem -- Status:


 * PM: butterfly theorem, id=3612 -- WP: butterfly theorem -- Status: A
 * Jeekc 14:20, 8 January 2006 (UTC)


 * PM: Carnot circles, id=5468 -- WP guess: Carnot circles -- Status:


 * PM: centroid, id=647 -- WP: centroid -- Status: A
 * Jeekc 15:39, 7 November 2005 (UTC)


 * PM: chord, id=3586 -- WP: chord (geometry) -- Status: A
 * Jeekc 09:42, 8 November 2005 (UTC)


 * PM: circle, id=4236 -- WP guess: circle -- Status:


 * PM: collinear, id=2281 -- WP: collinear -- Status: A
 * Jeekc 09:42, 8 November 2005 (UTC)


 * PM: complete quadrilateral, id=5469 -- WP guess: complete quadrilateral -- Status:


 * PM: concurrent, id=2286 -- WP: concurrency -- Status: A
 * Paul August &#9742; 04:12, 6 May 2006 (UTC)


 * PM: cosines law, id=27 -- WP: law of cosines -- Status: A
 * Oleg Alexandrov 02:49, 11 Feb 2005 (UTC) (on behalf of Tokek)


 * PM: cyclic quadrilateral, id=150 -- WP: cyclic quadrilateral -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: derivation of cosines law, id=713 -- WP guess: derivation of cosines law -- Status:


 * PM: diameter, id=1991 -- WP: diameter -- Status: A
 * Jeekc 17:15, 27 November 2005 (UTC)


 * PM: double angle identity, id=1623 -- WP guess: double angle identity -- Status:


 * PM: equilateral triangle, id=143 -- WP guess: equilateral triangle -- Status:


 * PM: Erd&#337;s-Anning Theorem, id=3814 -- WP guess: Erd&#337;s-Anning Theorem -- Status:


 * PM: Euler Line, id=155 -- WP: Euler Line -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: fundamental theorem on isogonal lines, id=3407 -- WP guess: fundamental theorem on isogonal lines -- Status:


 * PM: Gergonne point, id=1444 -- WP: Gergonne point -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: Gergonne triangle, id=1452 -- WP: Gergonne triangle -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: height, id=645 -- WP: Altitude (triangle) -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: Heron's formula, id=140 -- WP: Heron's formula -- Status: A
 * Jeekc 10:59, 8 November 2005 (UTC)


 * PM: hexagon, id=1441 -- WP: hexagon -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: hypotenuse, id=1096 -- WP: hypotenuse -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: isogonal conjugate, id=3406 -- WP: isogonal conjugate -- Status: NM
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: isosceles triangle, id=149 -- WP: isosceles triangle -- Status: A
 * Jeekc 15:43, 9 November 2005 (UTC)


 * PM: legs, id=1205 -- WP guess: Leg (geometry) -- Status: A
 * Jeekc 15:43, 9 November 2005 (UTC)


 * PM: Lemoine circle, id=1449 -- WP guess: Lemoine circle -- Status:


 * PM: Lemoine point, id=1448 -- WP: Lemoine point -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: magic circles, id=5704 -- WP guess: magic circles -- Status:


 * PM: medial triangle, id=3640 -- WP guess: medial triangle -- Status:


 * PM: median, id=142 -- WP: Median (geometry) -- Status: A
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: midpoint, id=627 -- WP: midpoint -- Status: NM
 * Jeekc 05:55, 9 November 2005 (UTC)


 * PM: Miquel point, id=5470 -- WP guess: Miquel point -- Status:


 * PM: Mollweide's equations, id=3160 -- WP guess: Mollweide's equations -- Status:


 * PM: Morley's theorem, id=141 -- WP guess: Morley's theorem -- Status:


 * PM: Newton's line, id=5471 -- WP guess: Newton's line -- Status:


 * PM: Newton-Gauss line, id=5480 -- WP guess: Newton-Gauss line -- Status:


 * PM: nine-point circle, id=3641 -- WP: nine-point circle -- Status: A
 * Jeekc 04:19, 14 January 2006 (UTC)


 * PM: orthic triangle, id=1447 -- WP guess: orthic triangle -- Status:


 * PM: orthocenter, id=646 -- WP guess: orthocenter -- Status:


 * PM: parallelogram, id=1081 -- WP: parallelogram -- Status: A
 * Jeekc 10:15, 8 November 2005 (UTC)


 * PM: parallelogram law, id=1082 -- WP: parallelogram law -- Status: A
 * Jeekc 10:15, 8 November 2005 (UTC)


 * PM: Pascal's mystic hexagram, id=1442 -- WP guess: Pascal's mystic hexagram -- Status:


 * PM: pedal triangle, id=3579 -- WP: pedal triangle -- Status: A
 * Oleg Alexandrov (talk) 07:56, 3 December 2005 (UTC)


 * PM: pentagon, id=1397 -- WP: pentagon -- Status: A
 * Jeekc 15:43, 9 November 2005 (UTC)


 * PM: polygon, id=1384 -- WP guess: polygon -- Status:


 * PM: proof of Apollonius theorem, id=2968 -- WP guess: proof of Apollonius theorem -- Status:


 * PM: proof of Apollonius theorem, id=2967 -- WP guess: proof of Apollonius theorem -- Status:


 * PM: proof of Brahmagupta's formula, id=3594 -- WP: Brahmagupta's formula -- Status: C
 * Jeekc 10:54, 8 November 2005 (UTC)


 * PM: proof of butterfly theorem, id=3613 -- WP guess: proof of butterfly theorem -- Status: N
 * Linked to Butterfly theorem. Jeekc 14:37, 8 January 2006 (UTC)


 * PM: proof of double angle identity, id=3168 -- WP guess: proof of double angle identity -- Status:


 * PM: proof of Erd&#337;s-Anning Theorem, id=3828 -- WP guess: proof of Erd&#337;s-Anning Theorem -- Status:


 * PM: proof of Heron's formula, id=2974 -- WP: Heron's formula -- Status: A
 * Jeekc 10:59, 8 November 2005 (UTC)


 * PM: proof of Mollweide's equations, id=3161 -- WP guess: proof of Mollweide's equations -- Status:


 * PM: proof of parallelogram law, id=2971 -- WP guess: proof of parallelogram law -- Status:


 * PM: proof of Ptolemy's inequality, id=3079 -- WP guess: proof of Ptolemy's inequality -- Status:


 * PM: proof of Ptolemy's theorem, id=2906 -- WP guess: proof of Ptolemy's theorem -- Status:


 * PM: proof of Pythagorean theorem, id=696 -- WP guess: proof of Pythagorean theorem -- Status:


 * PM: proof of Pythagorean theorem, id=3130 -- WP guess: proof of Pythagorean theorem -- Status:


 * PM: proof of Simson's line, id=3578 -- WP guess: proof of Simson's line -- Status:


 * PM: proof of Stewart's theorem, id=2908 -- WP guess: proof of Stewart's theorem -- Status:


 * PM: proof of tangents law, id=3632 -- WP guess: proof of tangents law -- Status:


 * PM: proof of Thales' theorem, id=3064 -- WP guess: proof of Thales' theorem -- Status:


 * PM: Ptolemy's theorem, id=100 -- WP guess: Ptolemy's theorem -- Status:


 * PM: Pythagorean theorem, id=98 -- WP: Pythagorean theorem -- Status: A
 * Jeekc 15:43, 9 November 2005 (UTC)


 * PM: quadrilateral, id=1072 -- WP: quadrilateral -- Status: A
 * Jeekc 17:15, 27 November 2005 (UTC)


 * PM: radius, id=2006 -- WP: radius -- Status: A
 * Jeekc 17:15, 27 November 2005 (UTC)


 * PM: rectangle, id=1084 -- WP: rectangle -- Status: NM
 * Jeekc 17:15, 27 November 2005 (UTC)


 * PM: regular polygon, id=2256 -- WP guess: regular polygon -- Status:


 * PM: regular polyhedron, id=2254 -- WP: Platonic solid -- Status: A
 * Jeekc 17:15, 27 November 2005 (UTC)


 * PM: rhombus, id=1088 -- WP: rhombus -- Status: M
 * Jeekc 17:15, 27 November 2005 (UTC)


 * PM: right triangle, id=650 -- WP: right triangle -- Status: A
 * Jeekc 17:15, 27 November 2005 (UTC)


 * PM: Schooten theorem, id=5482 -- WP guess: Schooten theorem -- Status:


 * PM: sector of a circle, id=3617 -- WP guess: sector of  a circle -- Status:


 * PM: Simson's line, id=2277 -- WP: Simson's line -- Status: NM
 * The part about the envelope of Simpson's line might need merging. Oleg Alexandrov (talk) 07:56, 3 December 2005 (UTC)


 * PM: sines law, id=28 -- WP: law of sines -- Status: A'''
 * Tokek 02:49, 11 Feb 2005 (UTC)


 * PM: sines law proof, id=757 -- WP guess: sines law proof -- Status:


 * PM: sines law proof, id=763 -- WP guess: sines law proof -- Status:


 * PM: some proofs for triangle theorems, id=5422 -- WP guess: some proofs for triangle theorems -- Status:


 * PM: square, id=1086 -- WP guess: square -- Status:


 * PM: Stewart's theorem, id=145 -- WP guess: Stewart's theorem -- Status:


 * PM: tangents law, id=3631 -- WP guess: tangents law -- Status:


 * PM: Thales' theorem, id=3063 -- WP guess: Thales' theorem -- Status:


 * PM: triangle, id=139 -- WP: triangle -- Status: A
 * Jeekc 15:43, 9 November 2005 (UTC)


 * PM: triangle center, id=655 -- WP guess: triangle center -- Status:


 * PM: circumcircle, id=6714 -- WP guess: circumcircle -- Status:


 * PM: determining when a point is inside a polygon, id=7201 -- WP guess: determining when a point is inside a polygon -- Status:


 * PM: non-Euclidean geometry, id=4669 -- WP guess: non-Euclidean geometry -- Status:


 * PM: origin, id=6797 -- WP: origin (mathematics) -- Status:


 * PM: when is a point inside a triangle, id=7199 -- WP guess: when is a point inside a triangle -- Status:


 * PM: n-section of line segment with compass and straightedge, id=9784new! -- WP guess: n-section of line segment with compass and straightedge -- Status:


 * PM: adjacent, id=9493new! -- WP guess: adjacent -- Status:


 * PM: alternative proof of necessity direction of equivalent conditions for triangles (hyperbolic and spherical), id=9539new! -- WP guess: alternative proof of necessity direction of equivalent conditions for triangles (hyperbolic and spherical) -- Status:


 * PM: angles of an isosceles triangle, id=9521new! -- WP guess: angles of an isosceles triangle -- Status:


 * PM: Archimedes' cylinders in cube, id=9704new! -- WP guess: Archimedes' cylinders in cube -- Status:


 * PM: area, id=9230new! -- WP guess: area -- Status:


 * PM: area of regular polygon, id=9501new! -- WP guess: area of regular polygon -- Status:


 * PM: Beltrami-Klein model, id=9409new! -- WP guess: Beltrami-Klein model -- Status:


 * PM: biangle, id=9400new! -- WP guess: biangle -- Status:


 * PM: bound on area of right triangle, id=8688new! -- WP guess: bound on area of right triangle -- Status:


 * PM: circle with given center and given radius, id=9563new! -- WP guess: circle with given center and given radius -- Status:


 * PM: cissoid of Diocles, id=9632new! -- WP guess: cissoid of Diocles -- Status:


 * PM: classification of Platonic solids, id=7885new! -- WP guess: classification of Platonic solids -- Status:


 * PM: comparison of common geometries, id=9543new! -- WP guess: comparison of common geometries -- Status:


 * PM: compass and straightedge construction of angle bisector, id=9502new! -- WP guess: compass and straightedge construction of angle bisector -- Status:


 * PM: compass and straightedge construction of center of given circle, id=9556new! -- WP guess: compass and straightedge construction of center of given circle -- Status:


 * PM: compass and straightedge construction of duplicating an angle, id=9548new! -- WP guess: compass and straightedge construction of duplicating an angle -- Status:


 * PM: compass and straightedge construction of geometric mean, id=9581new! -- WP guess: compass and straightedge construction of geometric mean -- Status:


 * PM: compass and straightedge construction of parallel line, id=9506new! -- WP guess: compass and straightedge construction of parallel line -- Status:


 * PM: compass and straightedge construction of perpendicular, id=9562new! -- WP guess: compass and straightedge construction of perpendicular -- Status:


 * PM: compass and straightedge construction of regular pentagon, id=9503new! -- WP guess: compass and straightedge construction of regular pentagon -- Status:


 * PM: compass and straightedge construction of regular triangle, id=9670new! -- WP guess: compass and straightedge construction of regular triangle -- Status:


 * PM: compass and straightedge construction of square, id=9671new! -- WP guess: compass and straightedge construction of square -- Status:


 * PM: concyclic, id=8204new! -- WP guess: concyclic -- Status:


 * PM: construct the center of a given circle, id=9555new! -- WP guess: construct the center of a given circle -- Status:


 * PM: construction of regular 2n-gon from regular n-gon, id=9677new! -- WP guess: construction of regular 2n-gon from regular n-gon -- Status:


 * PM: converse of isosceles triangle theorem, id=9526new! -- WP guess: converse of isosceles triangle theorem -- Status:


 * PM: converting between the Beltrami-Klein model and the Poincaré disc model, id=9431new! -- WP guess: converting between the Beltrami-Klein model and the Poincaré disc model -- Status:


 * PM: converting between the Poincaré disc model and the upper half plane model, id=9432new! -- WP guess: converting between the Poincaré disc model and the upper half plane model -- Status:


 * PM: coordinate way, id=9865new! -- WP guess: coordinate way -- Status:


 * PM: CPCTC, id=9522new! -- WP guess: CPCTC -- Status:


 * PM: crossed quadrilateral, id=9511new! -- WP guess: crossed quadrilateral -- Status:


 * PM: defect, id=8150new! -- WP guess: defect -- Status:


 * PM: determining from angles that a triangle is isosceles, id=9528new! -- WP guess: determining from angles that a triangle is isosceles -- Status:


 * PM: differential geometry, id=9558new! -- WP guess: differential geometry -- Status:


 * PM: equiangular polygon, id=9535new! -- WP guess: equiangular polygon -- Status:


 * PM: equiangular triangle, id=9537new! -- WP guess: equiangular triangle -- Status:


 * PM: equilateral polygon, id=9534new! -- WP guess: equilateral polygon -- Status:


 * PM: equivalent conditions for triangles, id=9536new! -- WP guess: equivalent conditions for triangles -- Status:


 * PM: Garfield's proof of Pythagorean theorem, id=9470new! -- WP guess: Garfield's proof of Pythagorean theorem -- Status:


 * PM: generalized Pythagorean theorem, id=9561new! -- WP guess: generalized Pythagorean theorem -- Status:


 * PM: geometric constructions by Euclid, id=9531new! -- WP guess: geometric constructions by Euclid -- Status:


 * PM: great circle, id=8164new! -- WP guess: great circle -- Status:


 * PM: hyperbola, id=9427new! -- WP guess: hyperbola -- Status:


 * PM: hyperbolic rotation, id=9782new! -- WP guess: hyperbolic rotation -- Status:


 * PM: ideal triangle, id=9447new! -- WP guess: ideal triangle -- Status:


 * PM: index of entries on compass and straightedge constructions, id=9505new! -- WP guess: index of entries on compass and straightedge constructions -- Status:


 * PM: isosceles trapezoid, id=9519new! -- WP guess: isosceles trapezoid -- Status:


 * PM: isosceles triangle theorem, id=9523new! -- WP guess: isosceles triangle theorem -- Status:


 * PM: kite, id=7789new! -- WP guess: kite -- Status:


 * PM: Lambert quadrilateral, id=9440new! -- WP guess: Lambert quadrilateral -- Status:


 * PM: length, id=8709new! -- WP guess: length -- Status:


 * PM: opposite, id=8012new! -- WP guess: opposite -- Status:


 * PM: parallel lines in hyperbolic geometry, id=9411new! -- WP guess: parallel lines in hyperbolic geometry -- Status:


 * PM: perimeter of ellipse, id=9244new! -- WP guess: perimeter of ellipse -- Status:


 * PM: PlanetMath graphics sandbox, id=8856new! -- WP guess: PlanetMath graphics sandbox -- Status:


 * PM: Poincaré disc model, id=9416new! -- WP guess: Poincaré disc model -- Status:


 * PM: Poincaré upper half plane model, id=9418new! -- WP guess: Poincaré upper half plane model -- Status:


 * PM: primitive, id=9516new! -- WP guess: primitive -- Status:


 * PM: prismatoid, id=9520new! -- WP guess: prismatoid -- Status:


 * PM: proof of Pythagorean theorem, id=9471new! -- WP guess: proof of Pythagorean theorem -- Status:


 * PM: regular polygon and circles, id=9626new! -- WP guess: regular polygon and circles -- Status:


 * PM: regular triangle, id=9538new! -- WP guess: regular triangle -- Status:


 * PM: rhomboid, id=9532new! -- WP guess: rhomboid -- Status:


 * PM: right trapezoid, id=9518new! -- WP guess: right trapezoid -- Status:


 * PM: Saccheri quadrilateral, id=9445new! -- WP guess: Saccheri quadrilateral -- Status:


 * PM: scalene triangle, id=8151new! -- WP guess: scalene triangle -- Status:


 * PM: semiperimeter, id=9245new! -- WP guess: semiperimeter -- Status:


 * PM: similarity in geometry, id=9455new! -- WP guess: similarity in geometry -- Status:


 * PM: trapezoid, id=9517new! -- WP guess: trapezoid -- Status:


 * PM: triangle solving, id=7684new! -- WP guess: triangle solving -- Status:


 * PM: unit disc, id=7741new! -- WP guess: unit disc -- Status:


 * PM: volume, id=9540new! -- WP guess: volume -- Status:


 * PM: volume as integral, id=9702new! -- WP guess: volume as integral -- Status:

51-01 Instructional exposition (textbooks, tutorial papers, etc.)

 * PM: geometry, id=3824 -- WP guess: geometry -- Status:


 * PM: \operatorname{arc tan} with two arguments, id=7105 -- WP guess: \operatornamearc tan with two arguments -- Status:


 * PM: construction of polar coordinates, id=6968 -- WP guess: construction of polar coordinates -- Status:


 * PM: coordinate systems, id=6977 -- WP guess: coordinate systems -- Status:


 * PM: Euclidean geometry of the plane, id=6962 -- WP guess: Euclidean geometry of the plane -- Status:


 * PM: polar coordinates, id=6963 -- WP guess: polar coordinates -- Status:


 * PM: polar curve, id=7076 -- WP guess: polar curve -- Status:


 * PM: adjacent, id=8011new! -- WP guess: adjacent -- Status:


 * PM: calculator trigonometric functions, id=8168new! -- WP guess: calculator trigonometric functions -- Status:


 * PM: corresponding angles in transversal cutting, id=9588new! -- WP guess: corresponding angles in transversal cutting -- Status:


 * PM: determining signs of trigonometric functions, id=8166new! -- WP guess: determining signs of trigonometric functions -- Status:


 * PM: Euclidean axiom by Hilbert, id=9672new! -- WP guess: Euclidean axiom by Hilbert -- Status:


 * PM: illustration of why SSA may not prove congruence, id=9362new! -- WP guess: illustration of why SSA may not prove congruence -- Status:


 * PM: parallellism in Euclidean plane, id=9533new! -- WP guess: parallellism in Euclidean plane -- Status:


 * PM: parallelogram theorems, id=9598new! -- WP guess: parallelogram theorems -- Status:


 * PM: proof of parallelogram theorems, id=9601new! -- WP guess: proof of parallelogram theorems -- Status:


 * PM: sohcahtoa, id=8010new! -- WP guess: sohcahtoa -- Status:


 * PM: terminal ray, id=8167new! -- WP guess: terminal ray -- Status:

51A05 General theory and projective geometries

 * PM: bisectors theorem, id=6485 -- WP: Angle bisector theorem -- Status: NM
 * Jeekc 17:32, 27 November 2005 (UTC)


 * PM: Ceva's theorem, id=745 -- WP guess: Ceva's theorem -- Status:


 * PM: Generalizations of Ceva theorem, id=5861 -- WP guess: Generalizations of Ceva theorem -- Status:


 * PM: Hesse configuration, id=5425 -- WP guess: Hesse configuration -- Status:


 * PM: Menelaus' theorem, id=3083 -- WP: Menelaus' theorem -- Status: A
 * Jeekc 17:32, 27 November 2005 (UTC)


 * PM: Pappus's theorem, id=2328 -- WP: Pappus's hexagon theorem -- Status: A
 * Jeekc 17:32, 27 November 2005 (UTC)


 * PM: proof of bisectors theorem, id=6487 -- WP guess: proof of bisectors theorem -- Status: N
 * Linked to the corresponding page. Jeekc 14:26, 8 January 2006 (UTC)


 * PM: proof of bisectors theorem, id=6488 -- WP guess: proof of bisectors theorem -- Status: N
 * Linked to the corresponding page. Jeekc 14:26, 8 January 2006 (UTC)


 * PM: proof of Ceva's theorem, id=2914 -- WP guess: proof of Ceva's theorem -- Status:


 * PM: proof of Menelaus' theorem, id=3092 -- WP guess: proof of Menelaus' theorem -- Status:


 * PM: proof of Pappus's theorem, id=4509 -- WP guess: proof of Pappus's theorem -- Status:


 * PM: proof of Pascal's mystic hexagram, id=4627 -- WP guess: proof of Pascal's mystic hexagram -- Status:


 * PM: proof of trigonometric version of Ceva's theorem, id=6484 -- WP guess: proof of trigonometric version of Ceva's theorem -- Status:


 * PM: trigonometric version of Ceva's theorem, id=6483 -- WP guess: trigonometric version of Ceva's theorem -- Status:


 * PM: (partial) linear space, id=9596new! -- WP guess: (partial) linear space -- Status:


 * PM: central collineations, id=8105new! -- WP guess: central collineations -- Status:


 * PM: circle has one center, id=9591new! -- WP guess: circle has one center -- Status:


 * PM: cotriangular space, id=9597new! -- WP guess: cotriangular space -- Status:


 * PM: fundamental theorem of projective geometry, id=7838new! -- WP guess: fundamental theorem of projective geometry -- Status:


 * PM: perspectivity, id=8082new! -- WP guess: perspectivity -- Status:


 * PM: polarities and forms, id=7986new! -- WP guess: polarities and forms -- Status:


 * PM: polarity, id=7981new! -- WP guess: polarity -- Status:


 * PM: projective geometry, id=7843new! -- WP guess: projective geometry -- Status:


 * PM: projectivity, id=7982new! -- WP guess: projectivity -- Status:

51A15 Structures with parallelism

 * PM: affine combination, id=8033new! -- WP guess: affine combination -- Status:


 * PM: affine geometry, id=7988new! -- WP guess: affine geometry -- Status:

51A30 Desarguesian and Pappian geometries

 * PM: Desargues' theorem, id=424 -- WP: Desargues' theorem -- Status: A
 * Jeekc 14:31, 8 January 2006 (UTC)


 * PM: proof of Desargues' theorem, id=4514 -- WP guess: proof of Desargues' theorem -- Status: N
 * Linked to Desargues' theorem's page. Jeekc 14:31, 8 January 2006 (UTC)


 * PM: Two generalizations of Desargues Theorem, id=5860 -- WP guess: Two generalizations of Desargues Theorem -- Status:

51A99 Miscellaneous

 * PM: pencil, id=7182 -- WP guess: pencil -- Status:

51D20 Combinatorial geometries

 * PM: Bertrand's problem, id=8553new! -- WP guess: Bertrand's problem -- Status:


 * PM: circle line picking, id=8587new! -- WP guess: circle line picking -- Status:


 * PM: circumscribe, id=8557new! -- WP guess: circumscribe -- Status:


 * PM: happy ending problem, id=8383new! -- WP guess: happy ending problem -- Status:


 * PM: inscribe, id=8558new! -- WP guess: inscribe -- Status:


 * PM: lazy caterer's sequence, id=8394new! -- WP guess: lazy caterer's sequence -- Status:


 * PM: Motzkin number, id=8455new! -- WP guess: Motzkin number -- Status:

51E15 Affine and projective planes

 * PM: projective line, id=5005 -- WP guess: projective line -- Status:

51E99 Miscellaneous

 * PM: dodecagon, id=5941 -- WP: dodecagon -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: dodecahedron, id=5947 -- WP: dodecahedron -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: enneacontahedron, id=5939 -- WP guess: enneacontahedron -- Status:


 * PM: heptahedron, id=5953 -- WP guess: heptahedron -- Status:


 * PM: hexahedron, id=5954 -- WP: hexahedron -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: hexecontahedron, id=5940 -- WP guess: hexecontahedron -- Status:


 * PM: icosahedron, id=5945 -- WP: icosahedron -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: icosidodecahedron, id=5942 -- WP: icosidodecahedron -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: icositetrahedron, id=5944 -- WP guess: icositetrahedron -- Status:


 * PM: nonahedron, id=5951 -- WP guess: nonahedron -- Status:


 * PM: octahedron, id=5952 -- WP: octahedron -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: pentahedron, id=5955 -- WP: pentahedron -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: tetradecahedron, id=5946 -- WP guess: tetradecahedron -- Status:


 * PM: tetrahedron, id=5956 -- WP: tetrahedron -- Status: NM
 * Need to add the mensuration part. Jeekc 11:04, 4 January 2006 (UTC)


 * PM: triacontahedron, id=5943 -- WP: triacontahedron -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: undecagon, id=5949 -- WP: undecagon -- Status: A
 * Jeekc 11:04, 4 January 2006 (UTC)


 * PM: undecahedron, id=5948 -- WP guess: undecahedron -- Status:

51F05 Absolute planes

 * PM: neutral geometry, id=7467 -- WP guess: neutral geometry -- Status:

51F20 Congruence and orthogonality

 * PM: congruence axioms, id=7426 -- WP guess: congruence axioms -- Status:

51F99 Miscellaneous

 * PM: Weizenbock's Inequality, id=3837 -- WP guess: Weizenbock's Inequality -- Status:


 * PM: directed segment, id=6644 -- WP guess: directed segment -- Status:


 * PM: compass and straightedge construction of similar triangles, id=9606new! -- WP guess: compass and straightedge construction of similar triangles -- Status:


 * PM: pentagram, id=9456new! -- WP guess: pentagram -- Status:

51G05 Ordered geometries (ordered incidence structures, etc.)

 * PM: angle, id=7440 -- WP guess: angle -- Status:


 * PM: betweenness in rays, id=7449 -- WP guess: betweenness in rays -- Status:


 * PM: ordered geometry, id=7326 -- WP guess: ordered geometry -- Status:


 * PM: Pasch's Theorem, id=7429 -- WP guess: Pasch's Theorem -- Status:


 * PM: ray, id=7331 -- WP guess: ray -- Status:


 * PM: a line segment has at most one midpoint, id=9637new! -- WP guess: a line segment has at most one midpoint -- Status:


 * PM: betweenness relation, id=9661new! -- WP guess: betweenness relation -- Status:


 * PM: complementary angles, id=9649new! -- WP guess: complementary angles -- Status:


 * PM: linear ordered geometry, id=9678new! -- WP guess: linear ordered geometry -- Status:


 * PM: proof of uniqueness of center of a circle, id=9625new! -- WP guess: proof of uniqueness of center of a circle -- Status:


 * PM: some theorems on strict betweenness relations, id=9666new! -- WP guess: some theorems on strict betweenness relations -- Status:


 * PM: some theorems on the axioms of order, id=9662new! -- WP guess: some theorems on the axioms of order -- Status:


 * PM: strict betweenness relation, id=9665new! -- WP guess: strict betweenness relation -- Status:

51H05 General theory

 * PM: torus, id=3274 -- WP guess: torus -- Status:

51K99 Miscellaneous

 * PM: compass and straightedge construction of inverse point, id=9547new! -- WP guess: compass and straightedge construction of inverse point -- Status:

51M04 Elementary problems in Euclidean geometries

 * PM: area of a spherical triangle, id=5841 -- WP guess: area of a spherical triangle -- Status:


 * PM: convex angle, id=6456 -- WP guess: convex angle -- Status:


 * PM: corollary of Morley's theorem, id=4479 -- WP guess: corollary of Morley's theorem -- Status:


 * PM: Napoleon's theorem, id=4538 -- WP guess: Napoleon's theorem -- Status:


 * PM: pivot theorem, id=1383 -- WP guess: pivot theorem -- Status:


 * PM: proof of Morley's theorem, id=4465 -- WP guess: proof of Morley's theorem -- Status:


 * PM: proof of pivot theorem, id=3674 -- WP guess: proof of pivot theorem -- Status:


 * PM: radian, id=6476 -- WP guess: radian -- Status:


 * PM: Sylvester's theorem, id=4770 -- WP guess: Sylvester's theorem -- Status:


 * PM: cone in \mathbb{R}^3, id=7357 -- WP guess: cone in \mathbbR^3 -- Status:


 * PM: cylinder, id=7345 -- WP guess: cylinder -- Status:


 * PM: developable surface, id=7348 -- WP guess: developable surface -- Status:


 * PM: ruled surface, id=7347 -- WP guess: ruled surface -- Status:


 * PM: antiprism, id=9219new! -- WP guess: antiprism -- Status:


 * PM: circumferential angle is half the corresponding central angle, id=9551new! -- WP guess: circumferential angle is half the corresponding central angle -- Status:


 * PM: Dehn's theorem, id=8422new! -- WP guess: Dehn's theorem -- Status:


 * PM: opposing angles in a cyclic quadrilateral are supplementary, id=9552new! -- WP guess: opposing angles in a cyclic quadrilateral are supplementary -- Status:


 * PM: proof of Dehn's theorem, id=8423new! -- WP guess: proof of Dehn's theorem -- Status:


 * PM: spherical trigonometry, id=9443new! -- WP guess: spherical trigonometry -- Status:


 * PM: surface of revolution, id=9627new! -- WP guess: surface of revolution -- Status:


 * PM: theorems of Euclid, id=9549new! -- WP guess: theorems of Euclid -- Status:

51M05 Euclidean geometries (general) and generalizations

 * PM: area of the n-sphere, id=4495 -- WP guess: area of the n-sphere -- Status:


 * PM: ellipsoid, id=6637 -- WP guess: ellipsoid -- Status:


 * PM: homology of the sphere, id=4490 -- WP guess: homology of the sphere -- Status:


 * PM: sphere, id=186 -- WP guess: sphere -- Status:


 * PM: spherical coordinates, id=4491 -- WP guess: spherical coordinates -- Status:


 * PM: spheroid, id=6638 -- WP: spheroid -- Status: A
 * Jeekc 14:34, 8 January 2006 (UTC)


 * PM: volume of the n-sphere, id=4496 -- WP guess: volume of the n-sphere -- Status:


 * PM: parallel postulate, id=4668 -- WP guess: parallel postulate -- Status:


 * PM: SNCF metric, id=7083 -- WP guess: SNCF metric -- Status:


 * PM: cylindrical coordinates, id=9317new! -- WP guess: cylindrical coordinates -- Status:

51M10 Hyperbolic and elliptic geometries (general) and generalizations

 * PM: Lobachevsky's formula, id=5484 -- WP guess: Lobachevsky's formula -- Status:


 * PM: AAA, id=9452new! -- WP guess: AAA -- Status:


 * PM: AAS is not valid in spherical geometry, id=9541new! -- WP guess: AAS is not valid in spherical geometry -- Status:


 * PM: limiting triangle, id=9408new! -- WP guess: limiting triangle -- Status:


 * PM: proof of AAA (hyperbolic), id=9454new! -- WP guess: proof of AAA (hyperbolic) -- Status:

51M15 Geometric constructions

 * PM: stereographic projection, id=7110 -- WP guess: stereographic projection -- Status:


 * PM: perpendicular bisector, id=8652new! -- WP guess: perpendicular bisector -- Status:

51M16 Inequalities and extremum problems

 * PM: Brunn-Minkowski inequality, id=4743 -- WP guess: Brunn-Minkowski inequality -- Status:


 * PM: Hadwiger-Finsler inequality, id=3061 -- WP guess: Hadwiger-Finsler inequality -- Status:


 * PM: isoperimetric inequality, id=5397 -- WP guess: isoperimetric inequality -- Status:


 * PM: proof of Hadwiger-Finsler inequality, id=3062 -- WP guess: proof of Hadwiger-Finsler inequality -- Status:

51M20 Polyhedra and polytopes; regular figures, division of spaces

 * PM: polyhedron, id=1627 -- WP guess: polyhedron -- Status:

51M25 Length, area and volume

 * PM: area of a polygonal region, id=9290new! -- WP guess: area of a polygonal region -- Status:


 * PM: solid of revolution, id=9685new! -- WP guess: solid of revolution -- Status:


 * PM: volume of ellipsoid, id=9700new! -- WP guess: volume of ellipsoid -- Status:


 * PM: volume of solid of revolution, id=9691new! -- WP guess: volume of solid of revolution -- Status:

51M99 Miscellaneous

 * PM: cevian, id=1446 -- WP guess: cevian -- Status:


 * PM: congruence, id=1467 -- WP guess: congruence -- Status:


 * PM: Euler line proof, id=156 -- WP guess: Euler line proof -- Status:


 * PM: incenter, id=1451 -- WP guess: incenter -- Status:


 * PM: incircle, id=1450 -- WP guess: incircle -- Status:


 * PM: secant line, id=6512 -- WP guess: secant line -- Status:


 * PM: SSA, id=2696 -- WP guess: SSA -- Status:


 * PM: symmedian, id=1445 -- WP guess: symmedian -- Status:


 * PM: chordal, id=6873 -- WP guess: chordal -- Status:


 * PM: limited tangent, id=6857 -- WP guess: limited tangent -- Status:


 * PM: power of point, id=6854 -- WP guess: power of point -- Status:


 * PM: proof of triangle incenter, id=9529new! -- WP guess: proof of triangle incenter -- Status:

51N05 Descriptive geometry

 * PM: piecewise smooth, id=3236 -- WP guess: piecewise smooth -- Status:


 * PM: rectifiable, id=3235 -- WP: rectifiable curve -- Status: A
 * WP rectifiable should redirect to the more general notion of rectifiable set linas 17:08, 26 August 2006 (UTC)


 * PM: Bézier curve, id=7272 -- WP guess: Bézier curve -- Status:


 * PM: catenary, id=7146 -- WP guess: catenary -- Status:


 * PM: integral representation of length of smooth curve, id=7594 -- WP guess: integral representation of length of smooth curve -- Status:


 * PM: straight line is shortest curve between two points, id=7595 -- WP guess: straight line is shortest curve between two points -- Status:


 * PM: tractrix, id=7109 -- WP guess: tractrix -- Status:


 * PM: arclength as filtered limit, id=7793new! -- WP guess: arclength as filtered limit -- Status:


 * PM: B-spline, id=9721new! -- WP guess: B-spline -- Status:


 * PM: locus, id=9436new! -- WP guess: locus -- Status:


 * PM: NURBS curve, id=9499new! -- WP guess: NURBS curve -- Status:


 * PM: NURBS surface, id=9766new! -- WP guess: NURBS surface -- Status:


 * PM: parallel curve, id=9544new! -- WP guess: parallel curve -- Status:


 * PM: properties of parallel curves, id=9571new! -- WP guess: properties of parallel curves -- Status:

51N10 Affine analytic geometry

 * PM: barycentric coordinates, id=8216new! -- WP guess: barycentric coordinates -- Status:


 * PM: relative interior, id=8466new! -- WP guess: relative interior -- Status:

51N20 Euclidean analytic geometry

 * PM: Cartesian coordinates, id=6016 -- WP: Cartesian coordinates -- Status: A
 * Tompw 12:50, 26 March 2006 (UTC)


 * PM: confocal, id=6388 -- WP: confocal -- Status: NM
 * Tompw 12:50, 26 March 2006 (UTC)


 * PM: conic section, id=3584 -- WP: conic section -- Status: 'NM'''
 * Tompw 12:50, 26 March 2006 (UTC)


 * PM: conjugate hyperbola, id=6241 -- WP guess: conjugate hyperbola -- Status:


 * PM: proof of Steiner's theorem, id=4520 -- WP guess: proof of Steiner's theorem -- Status:


 * PM: proof of Van Aubel theorem, id=5413 -- WP guess: proof of Van Aubel theorem -- Status:


 * PM: proof of Van Aubel's Theorem, id=4736 -- WP guess: proof of Van Aubel's Theorem -- Status:


 * PM: quadrant, id=6293 -- WP guess: quadrant -- Status:


 * PM: slope, id=6457 -- WP: slope -- Status: A
 * Jeekc 04:23, 14 January 2006 (UTC)


 * PM: Steiner's theorem, id=3887 -- WP guess: Steiner's theorem -- Status:


 * PM: tangent of conic section, id=6008 -- WP guess: tangent of conic section -- Status:


 * PM: three theorems on parabolas, id=2958 -- WP guess: three theorems on parabolas -- Status:


 * PM: unit hyperbola, id=5996 -- WP guess: unit hyperbola -- Status:


 * PM: Van Aubel theorem, id=5412 -- WP guess: Van Aubel theorem -- Status:


 * PM: distance from point to a line, id=7248 -- WP guess: distance from point to a line -- Status:


 * PM: quadratic surfaces, id=6700 -- WP: Quadric -- Status:
 * Tompw 12:50, 26 March 2006 (UTC)


 * PM: proof that the slope of a line is well-defined, id=7442 -- WP guess: proof that the slope of a line is well-defined -- Status: NM


 * PM: tangent plane of quadratic surface, id=6681 -- WP guess: tangent plane of quadratic surface -- Status:


 * PM: angle between two lines, id=9485new! -- WP guess: angle between two lines -- Status:


 * PM: angle between two planes, id=8457new! -- WP guess: angle between two planes -- Status:


 * PM: angle bisector as locus, id=9492new! -- WP guess: angle bisector as locus -- Status:


 * PM: area of a quadrilateral, id=9248new! -- WP guess: area of a quadrilateral -- Status:


 * PM: curve of Agnesi, id=8892new! -- WP guess: curve of Agnesi -- Status:


 * PM: envelope, id=9484new! -- WP guess: envelope -- Status:


 * PM: equation of plane, id=9866new! -- WP guess: equation of plane -- Status:


 * PM: line in space, id=9867new! -- WP guess: line in space -- Status:


 * PM: parabola, id=9444new! -- WP guess: parabola -- Status:


 * PM: proof of area of a quadrilateral, id=9266new! -- WP guess: proof of area of a quadrilateral -- Status:


 * PM: slope angle, id=9546new! -- WP guess: slope angle -- Status:


 * PM: transition to skew-angled coordinates, id=9472new! -- WP guess: transition to skew-angled coordinates -- Status:

51N99 Miscellaneous

 * PM: asymptote, id=6100 -- WP guess: asymptote -- Status:


 * PM: projection of point, id=9475new! -- WP guess: projection of point -- Status: