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

解

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 .

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

解答ステップ

Given:

a re a : 4.8 c m^{2}

指定された円の半径

A re a = 4.8 : r = 1.23607 \dots

指定された円周

r = 1.23607 \dots : C = 7.76650 \dots

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