Q8:
B
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
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...
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