galinaphillips Junior | Next Rank: 30 Posts View User Profile Posts: 28 Joined: Sat May 26, 2007 10:12 am Thanked: 1 times Equilateral triangle arc diameter by galinaphillips » Sun Jun 03, 2007 6:31 pm How do you calculate the diameter of the circle given an equilateral triangle and an arc? Thanks! Attachments Top Quote