User talk:2601:601:1300:DCB0:C91F:1866:42C3:7976

Altered the anular area calculation, should converge to a full annulus at α = π...
Figure of anular area shows α as half angle – formula is wrong (I checked it with AutoCAD). Figure needs to be updated, or formula corrected to 2α. 158.129.205.253 (talk) 17:07, 18 July 2024 (UTC)