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Phổ biến Word Problems >

The chu vi of a circle is 25pi cm. What is the area, in square centimeters? 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 25 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 p iπ .

Lời Giải

a re a : 490.87 c m^{2}

Các bước giải pháp

Given:

c i rc u m f ere n ce : 25 π c m

Bán kính đường tròn đã cho

C i rc u m f ere n ce = 25 π : r = 12.5

Diện tích hình tròn đã cho

r = 12.5 : A = 490.87385 \dots

a re a : 490.87 c m^{2}

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