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一个圆内接等腰边三角形。
in the figure above,equilateral triangle ABC is inscribed in the circle. If the length of arc ABC is 24, what is the approximate diameter of the circle?
5,8,11,15,9
这道题怎么算都是靠近8啊，答案给的是11
The arc ABC is 2/3 of the circumference of the circle. So pai * d = 36, diameter d = 36 /3.14 =11 |
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