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Phổ biến Word Problems >

The area of a circle is 25pi cm. What is the chu vi, in centimeters? Express your answer in terms of pipi.

Lời Giải

T h e a re a o f a c i rc l e i s 25 π c m . Wha t i s t h e c i rc u m f ere n ce, in 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

c i rc u m f ere n ce : 10 π c m

+1

Số thập phân

31.41592 \dots

Các bước giải pháp

Given:

a re a : 25 π c m^{2}

Bán kính đường tròn đã cho

A re a = 25 π : r = 5

Chu vi hình tròn đã cho

r = 5 : C = 10 π

c i rc u m f ere n ce : 10 π c m

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