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

Answer:

A) 25.1 cm

Step-by-step 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

Answer 2

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.