gprep - geometry

This topic has expert replies
Senior | Next Rank: 100 Posts
Posts: 66
Joined: Wed Feb 20, 2008 6:23 pm
Thanked: 2 times

gprep - geometry

by anjaligeorge1 » Tue Jun 17, 2008 10:11 am
hw do i solve this question.
Attachments
geometry.doc
(58 KiB) Downloaded 115 times

Master | Next Rank: 500 Posts
Posts: 167
Joined: Tue Apr 22, 2008 12:48 am
Thanked: 15 times

by durgesh79 » Tue Jun 17, 2008 10:29 am
length of the Arc ABC = 24

we know length of total circle (perimeter) = pi * d ( d is the diameter)

arc ABC = 2/3 * (perimeter) = 2/3 * pi * d

d = 11

The key here is that the equilateral traingle divides the circle in 3 equal parts.