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Phổ biến Word Problems >

The chu vi of a circle is 7pi ft. What is the area, in square feet? Express your answer in terms of pipi.

Lời Giải

T h e c i rc u m f ere n ce o f a c i rc l e i s 7 π f t . Wha t i s t h e a re a, in s q u a re f ee t ? E x p ress yo u r an s w er in t er m s o f p iπ .

Lời Giải

a re a : 38.48 f t^{2}

Các bước giải pháp

Given:

c i rc u m f ere n ce : 7 π f t

Bán kính đường tròn đã cho

C i rc u m f ere n ce = 7 π : r = 3.5

Diện tích hình tròn đã cho

r = 3.5 : A = 38.48451 \dots

a re a : 38.48 f t^{2}

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