The 円周 of a circle is 15pi cm. What is the area, in square centimeters? Express your answer in terms of

解

T h e c i rc u m f ere n ce o f a c i rc l e i s 15 π c m . Wha t i s t h e a re a, in s q u a re ce n t im e t ers ? E x p ress yo u r an s w er in t er m s o f

a re a : 176.71 c m^{2}

解答ステップ

Given:

c i rc u m f ere n ce : 15 π c m

指定された円の半径

C i rc u m f ere n ce = 15 π : r = 7.5

指定された円の面積

r = 7.5 : A = 176.71458 \dots

a re a : 176.71 c m^{2}