请教GWD 3-8

游魂

Q8:

B

INE>INE>INE>INE>INE>INE>

A C

In the figure shown, the triangle is inscribed in the semicircle. If the length of line segment AB is 8 and the length of line segment BC is 6, what is the length of arc ABC?

A. 15p

B. 12p

C. 10p

D. 7p

E. 5p

himba

勾股定理，得AC=10,也就是圆直径为10，问半圆的弧长（=圆周长的一半）

所以PI*10/2=5PI...

游魂

谢谢版主！！！