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

##### 1 Answer

#### Explanation:

Using the formula,

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