Circle Radius Diameter Circumference

What is the diameter?

• 8

• 16

• 10

• 4

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards

• 25 yards

• 150 yards

• 15 yards

What is the radius?

What is the diameter?

If the radius of a circle is 12.5 meters, the diameter is ____

• 6.25 meters

• 125 meters

• 25 meters

• 50 meters

Meg swam from one side of her circular pool to the other side going through the center.  If Meg swam 8 feet, what is the approximate circumference of Meg's pool?

• 16 feet

• 25.12 feet

• 251.2 feet

• 4 feet

Find the circumference of the circle.

• 31.4 cm

• 78.5 cm

• 314 cm

• 15.7 cm

What is the area of this circle?

• 1385

• 2142

• 5541

• 1289

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

A remodeling project calls for sanding a chair with a disk sander. The sanding disk used on the sander has a radius of 4.5 inches. Find the area of the disk. Use 3.14 for π

•  about 64.79 in2

•  about 55.19 in2

•  about 63.59 in2

•  about 53.79 in2