[問題]PP-T1-PS-107

[amyliang]

107.11225-!-item-!-187;#058&007613
In the figure above, equilateral triangle ABC is inscribed in the circle. If the length of arc ABC is 24, what is the approximate diameter of the circle? (圖形就是一個圓裡面有一個正三角形，頂點是B 二個底角是A&C)

(A) 5
(B) 8
(C) 11
(D) 15
(E) 19
Ans:c (不會算 請那個大大教一下)

[nemolee]

http://www.formosamba.com/phpBB3/viewtopi ... the+circle