Question

A paper plate has a diameter of 9 inches.what is the circumference of the plate

Answer 1

$\pi 4.5^2$

Answer 2

We can use this formula: C = 2 * $\pi$ * r
We can't use the diameter in this formula. We have to use the radius. And the radius is half of the diameter.

9 / 2 = 4.5

And we'll also use 3.14 for [tex] \pi [/text].

Plug in all the values:

C = 2 * 3.14 * 4.5
C = 28.26

So, the circumference is 28.26.