Question

The circumference of a circle is 4 pi find the radius and the area of the circle show your working clearly

Answer 1

Answer: r=2

Explanation:

C=2 x r x pi

4pi= 2r x pi /:pi

4=2r /:2

2=r --> r=2

Answer 2

Explanation:

To find the radius of a circumference of a circle

C=2π r

C=4π

4π=2×π×r

To get radius

Divide through by 2π

r=2

To find the area

A=πr^2

A=3.142×2^2

A=3.142×4

A=12.568 units square