The 円周 of a circle is 22pi in. What is the area, in square inches? Express your answer in terms of pipi

解

T h e c i rc u m f ere n ce o f a c i rc l e i s 22 π in . Wha t i s t h e a re a, in s q u a re in c h es ? E x p ress yo u r an s w er in t er m s o f p iπ

a re a : 121 π i n^{2}

十進法表記

380.13271 \dots

解答ステップ

Given:

c i rc u m f ere n ce : 22 π in

指定された円の半径

C i rc u m f ere n ce = 22 π : r = 11

指定された円の面積

r = 11 : A = 121 π

a re a : 121 π i n^{2}