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人気のある Word Problems >

The area of a circle is 81𝜋 square feet. What is the 円周?

解

T h e a re a o f a c i rc l e i s 81​𝜋 s q u a re f ee t . Wha t i s t h e c i rc u m f ere n ce ?

解

c i rc u m f ere n ce : 18 π f t

+1

十進法表記

56.54866 \dots

解答ステップ

Given:

a re a : 81 π f t^{2}

指定された円の半径

A re a = 81 π : r = 9

指定された円周

r = 9 : C = 18 π

c i rc u m f ere n ce : 18 π f t

人気の例

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