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HEEELLLPPPPPPPPP THIS IS HARD TO UNDERSTANDDDDDDDD
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HEEELLLPPPPPPPPP THIS IS HARD TO UNDERSTANDDDDDDDD

HEEELLLPPPPPPPPP THIS IS HARD TO UNDERSTANDDDDDDDD-example-1
User Abhishek Shrivastava
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C=2πr 的替代公式是 C=πd。

这是直径，是给定的测量值。

这意味着我们可以：

C = π*20 = 62.8ft

本题已由中国数学会官方解答（现有会员：3人）

User Jelly Bean
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