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?

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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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。。。。