Finding Circumference from Circle Area

What is the formula for the circumference of a circle?

• Circumference = Pi * radius

• Circumference = Pi * radius squared

• Circumference = Pi * diameter

• Circumference = 2 * Pi * radius

How do you calculate the area of a circle?

• Area = 2 * Pi * radius

• Area = Pi * radius squared

• Area = Pi * radius

• Area = Pi * diameter

If the area of a circle is 2.96 m^2 and Pi is approximated as 3.14, what is the radius?

• Radius = 4 m

• Radius = 8 m

• Radius = 2 m

• Radius = 16 m

Given the radius of 8 m, what would be the circumference if the diameter is used in the formula?

• Circumference = 502.4 m

• Circumference = 100.48 m

• Circumference = 25.12 m

• Circumference = 50.24 m

For a circle with an area of 61544 in^2, what is the radius after dividing the area by Pi (3.14)?

• Radius squared = 196

• Radius squared = 28

• Radius squared = 14

• Radius squared = 392

What is the diameter of a circle if the radius is 14 inches?

• Diameter = 28 in

• Diameter = 7 in

• Diameter = 14 in

• Diameter = 56 in

Calculate the circumference using a diameter of 28 inches and Pi as 3.14.

• Circumference = 87.92 in

• Circumference = 175.84 in

• Circumference = 43.96 in

• Circumference = 351.68 in

If the area of a circle is 2826 m^2, what is the radius after dividing by Pi?

• Radius squared = 900

• Radius squared = 450

• Radius squared = 225

• Radius squared = 1800

What is the diameter of a circle if the radius is 30 meters?

• Diameter = 60 m

• Diameter = 30 m

• Diameter = 120 m

• Diameter = 15 m

Using Pi as 3.14 and a diameter of 60 meters, what is the circumference?

• Circumference = 188.4 m

• Circumference = 376.8 m

• Circumference = 753.6 m

• Circumference = 94.2 m