Question

The diameter of a circle is 13 m. Find its circumference in terms of pie

Answer 1

The answer is
`13\pi` or 40.84

Explanation:

We are given the diamater so

`r=(d)/(2)`

`r=(13)/(2)`

`r=6.5`

Formula for circumference.

Take note.

C = circumference

r = radius

`C=2\pi r`

You want your answer in terms of Pi.

So we can write another equation.

`2\pi r=\pi x`

x stands for the number in terms of Pi.

Now we can solve for x.

`x=(2\pi r)/(\pi )`

Now lets plug in what we know.

`x=(2*\pi*6.5 )/(\pi )`

`x=13`