Question

What is the approximate circumference of the circle below?

A. 25.1 centimeters

B. 28.3 centimeters

C. 31.4 centimeters

D. 34.6 centimeters

Answer 1

A. 25.1
When you take the radius and double it, you get the diameter. When you multiply the diameter by 3.14, you find the circumference.
4(2)=8
8(3.14)= 25.12, A.

Answer 2

A) 25.1 cm

Explanation:

Circumference of a circle =
`2\pi r`, where r = radius

⇒ circumference of circle with radius 4 cm = 2 x
`\pi` x 4 = 8
`\pi` ≈ 25.1 cm