Question

The diameter of a circle is 35cm.find its cirumference?

Answer 1

`C=35pi` cm

Explanation:

The circumference `C` of a circle is given by

`C=2pir` where `r` is the radius.

Since the radius is half of the diameter, meaning that the diameter is twice the radius ( `d=2r`), we can rewrite the above formula as

`C=pid.` We're given `d=35cm,` so `C=35pi cm`

Answer 2

The circumference is about `110` cm.

Explanation:

The circumference of a circle is `pitimes`diameter.

Therefore, circumference `=pitimes35approx109.96`