Question

Find the circumference of the circle with the given radius or diameter. (Use 3.14 for π.)

radius = 20 in.
a.
1,256 in.
b.
125.6 in.
c.
5,024 in.
d.
62.8

Answer 1

C= 2πr
C= 2 x 3.14 x 20
C = 125.6

answer: b. 125.6 in.

Answer 2

Answer: b.

125.6 in.

Explanation:

We know that the circumference of a circle is given by :_

`\text{Circumference}=2\pi r`, where r is the radius of the circle.

Given : The radius of the circle : r= 20 i.

Then , the circumference of the circle is given by :-

`\text{Circumference }=2(3.14)(20)\\\\\Rightarrow\ \text{Circumference }=125.6\ in.`

Hence, the circumference of the circle = 125.6 in.