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受欢迎的 Word Problems >

The 半径 of a circle is 9 ft. Find its area in terms of pipi.

解答

T h e r a d i u s o f a c i rc l e i s 9 f t . F in d i t s a re a in t er m s o f p iπ .

解答

a re a : 81 π f t^{2}

+1

十进制

254.46900 \dots

求解步骤

Given:

r a d i u s : 9 f t

给定

r = 9

的圆面积:

A = 81 π

a re a : 81 π f t^{2}

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