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受欢迎的 Word Problems >

The area of a circle is 81𝜋 square centimeters. What is the 直径?

解答

T h e a re a o f a c i rc l e i s 81​𝜋 s q u a re ce n t im e t ers . Wha t i s t h e d iam e t er ?

解答

d iam e t er : 18 c m

求解步骤

Given:

a re a : 81 π c m^{2}

给定

A re a = 81 π

的圆半径:

r = 9

给定

r = 9

的圆直径:

d = 18

d iam e t er : 18 c m

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