Question

What is the exact area of a circle with a radius of 19m?

Answer 1

$$\Huge A= \pi r^2$$

Answer 2

when given the radius it is simple to find the exact area of a circle! there is a formula you should always remember for such things.

Answer 3

A is the area
pi is a constant value which equals roughly 3.14.
r is the radius.
BECAUSE this wants EXACT value, pi is going to be in your answer.