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受欢迎的 Word Problems >

The 半径 of a circle is 9 miles. What is the circle's area?

解答

T h e r a d i u s o f a c i rc l e i s 9 mi l es . Wha t i s t h e c i rc l e^{'} s a re a ?

解答

a re a : 81 π mi l e^{2}

+1

十进制

254.46900 \dots

求解步骤

Given:

r a d i u s : 9 mi l e

给定

r = 9

的圆面积:

A = 81 π

a re a : 81 π mi l e^{2}

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