Question

How do you find the area of a circle if you already have the diameter

Answer 1

The area of a circle is Pi * Radius^2 or Pi * diameter.

So do 3.14 * the diameter.

Answer 2

If you have the diameter of a circle, you can use it to find the area of that circle. Just plug that value into the formula for the area of a circle and solve. Hope this helps. :)