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受欢迎的 Word Problems >

Find the area of a circle whose 周长 is 21.98 meters. Use 3.14 for pi If necessary, round to the nearest hundredth.

解答

F in d t h e a re a o f a c i rc l e w h ose c i rc u m f ere n ce i s 21.98 m e t ers . U se 3.14 f or π I f n ecess a ry, ro u n d t o t h e n e a res t h u n d re d t h .

解答

a re a : 38.45 m^{2}

求解步骤

Given:

c i rc u m f ere n ce : 21.98 m

给定

C i rc u m f ere n ce = 21.98

的圆半径:

r = 3.49822 \dots

给定

r = 3.49822 \dots

的圆面积:

A = 38.44549 \dots

a re a : 38.45 m^{2}

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