## How do you find area with diameter?

To find the area with the diameter, simply divide the diameter by 2, plug it into the radius formula, and solve as before.

To get the area from the circumference, take the square of the circumference and divide by pi.

## How do you find area with circumference?

To find the circumference, you double the radius and multiply by pi. To find the area, you square the radius and multiply by pi.

## What is a diameter of a circle?

2 x radius

## How do you find the circumference of a circle with the diameter?

The circumference = π x the diameter of the circle (Pi multiplied by the diameter of the circle). Simply divide the circumference by π and you will have the length of the diameter. The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the circle!