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Phổ biến Word Problems >

The area of a circle is 4.8 cm2. Find the chu vi of the circle, rounding your answer to 3 significant figures.

Lời Giải

T h e a re a o f a c i rc l e i s 4.8 c m 2. F in d t h e c i rc u m f ere n ce o f t h e c i rc l e, ro u n d in g yo u r an s w er t o 3 s i g ni f i c an t f i gu res .

Lời Giải

c i rc u m f ere n ce : 7.77 c m

Các bước giải pháp

Given:

a re a : 4.8 c m^{2}

Bán kính đường tròn đã cho

A re a = 4.8 : r = 1.23607 \dots

Chu vi hình tròn đã cho

r = 1.23607 \dots : C = 7.76650 \dots

c i rc u m f ere n ce : 7.77 c m

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