List of self-intersecting polygons

Self-intersecting polygons, crossed polygons, or self-crossing polygons are polygons some of whose edges cross each other. They contrast with simple polygons, whose edges never cross.

Some types of self-intersecting polygons are:
 * the crossed quadrilateral, with four edges
 * the antiparallelogram, a crossed quadrilateral with alternate edges of equal length
 * the crossed rectangle, an antiparallelogram whose edges are two opposite sides and the two diagonals of a rectangle, hence having two edges parallel
 * Star polygons
 * pentagram, with five edges
 * Hexagram, with six edges
 * heptagram, with seven edges
 * octagram, with eight edges
 * enneagram or nonagram, with nine edges
 * decagram, with ten edges
 * hendecagram, with eleven edges
 * dodecagram, with twelve edges
 * icositetragram, with twenty four edges
 * 257-gram, with two hundred and fifty seven edges