Prove-that-among-all-triangles-which-have-same-circum-radius-the-equilateral-triangle-has-maximum-area-

Question Number 5822 by Rasheed Soomro last updated on 30/May/16

P r o v e t h a t a m o n g a l l t r i a n g l e s,

w h i c h h a v e s a m e c i r c u m - r a d i u s,

t h e e q u i l a t e r a l t r i a n g l e h a s

m a x i m u m a r e a .