Question

A circle has a radius of 7cm. Which of these is closest to its circumference?

Answer 1

Approximately 22 or 7πcm

Explanation:

The ratio between the circumference of a circle and its diameter is π. We commonly write c=2πr, using the radius instead and doubling.

In the given example, we are told that the diameter is

7 cm. So using the common approximation π≈
`(22)/(7)` we find that the circumference is approximate:

`(22)/(7) * 7cm= 22 cm`

Answer 2

You didn't list the answers but it's 43.98 so close to 44 I'm guessing

Explanation:

circumference=2*pi*r

2*3.14*7=about 44