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A circle has circumference of 20.7cm. What is the area of the circle? Using 3.14
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A circle has circumference of 20.7cm. What is the area of the circle? Using 3.14

User Ravi Saroch
by
8.6k points

2 Answers

6 votes
circumference=2pi*r
20.7=2pi*r
r=3.296 or 3.3
A=pir^2
a=34.1946 or about 34.19
User Yehuda
by
8.4k points
1 vote
Hey!

Circumference = 20.7 cm
Circumference of circle= 2πr


20.7= 2×3.14×r
20.7=6.28×r
20.7/6.28= r
r= 3.29 cm

Area of circle = πr^2
Area= 3.14×3.29×3.29
Area= 33.98 cm^2

Hope it helps...!!!
User Willmac
by
8.6k points
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