Question

If the radius of a circle is 4cm, what is the area?

Answer 1

`"50.24 cm"^2`

Explanation:

Using the formula,

`"Area" = pi xxr^2`

Here

• `pi` is a button on your calculator you can find, but is also generally known as `3.14`, you can use either one, but teachers usually prefer you use the `pi` button.
• `r =` the radius, in your case, it's `"4 cm"`

So

`"Area" = pi xxr^2`

`= pi xx ("4 cm")^2`

`= 16pi \ "cm"^2 ~~ "50.24 cm"^2`