Given the area of a circle find the radius

The video tutorial explains how to calculate the area of a circle using the formula πR². It discusses the relationship between the area and circumference formulas, and demonstrates how to solve for the radius when given the area. The tutorial concludes by showing how to calculate the diameter from the radius.

What is the formula for the area of a circle?

• R²

• πD

• 2πR

• πR²

Which formula is used to calculate the circumference of a circle?

• πR²

• 2πR

• πD

• R²

If the area of a circle is 36π, what is the radius?

• 12

• 6

• 18

• 3

How do you find the radius from the area of a circle?

• Divide the area by 2

• Multiply the area by π

• Multiply the area by 2

• Divide the area by π and take the square root

What is the diameter of a circle if the radius is 6?

• 12

• 6

• 18

• 3