请教GWD3-8

casualwalk

Q8:

B

INE>INE>INE>INE>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

请高人指教为什么选e?

girls

这题一点都不难啊，你哪里不理解？先求出AC就知道圆的直径，然后求半圆的周长啊。。。。

casualwalk

多谢指点.可仔细读题,没找出哪说1.ABC是直角三角形;2.AC是圆的直径呀?主要不确定于此.

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