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

Jul 5, 2018

$16 \pi$ or $\approx 50.24$ units

Explanation:

The area of a circle is given by the expression

$\pi {r}^{2}$ where $r$ is the radius.

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

$\pi \cdot {4}^{2} = 16 \pi$ units

We can approximate this using $3.14$ as $\pi$ to get

$3.14 \cdot 16 = 50.24$ units

Notice, $16 \pi$ 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!