Q8: (I'm sorry that the figure cannot be pasted and Pi becomes p in the choices)
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
<ABC be equal to 90 for sure ,可以证明.
直径所对的圆周角是直角。
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