Question

Find the circumference of the circle. Use 3.14 or 227 for π.

Answer 1

#3

The rule of the circumference of the circle is

`C=\pi d`

d is the diameter of the circle

From the given picture we can see

A circle with a diameter of 20 cm, then

`d=20`

Substitute d in the rule by 20

Use pi = 3.14

`\begin{gathered} C=3.14*20 \\ C=62.8\text{ cm} \end{gathered}`

The circumference of the circle is 62.8 cm