Question

Whats the area of a circle with a radius of 4?

Answer 1

`16pi` or `~~50.24` units

Explanation:

The area of a circle is given by the expression

`pir^2` where `r` is the radius.

Since we know our radius, we can plug this into our expression to get

`pi*4^2=16pi` units

We can approximate this using `3.14` as `pi` to get

`3.14*16=50.24` units

Notice, `16pi` is an exact answer, but we can get an estimate of the area by using `3.14` as `pi` because sometimes it isn't intuitive to express area in terms of `pi`.

Hope this helps!