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Phổ biến Word Problems >

circle has an area of 20ft^2 What is the chu vi of the circle (Round to 3 decimal places)?

Lời Giải

c i rc l e ha s an a re a o f 20 f t^{2} Wha t i s t h e c i rc u m f ere n ce o f t h e c i rc l e (R o u n d t o 3 d ec ima l pl a ces) ?

Lời Giải

c i rc u m f ere n ce : 45 π f t

+1

Số thập phân

15.85330 \dots

Các bước giải pháp

Given:

a re a : 20 f t^{2}

Bán kính đường tròn đã cho

A re a = 20 : r = \frac{2 5}{π}

Chu vi hình tròn đã cho

r = \frac{2 5}{π} : C = 45 π

c i rc u m f ere n ce : 45 π f t

Ví dụ phổ biến

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