Circle Vocabulary
Finding Radius
(find the radius for all)
Finding Diameter
Finding Circumference
Finding Area
(Find area for all)
100

The distance from the center of a circle to the outside, also half of the diameter

What is Radius

100

What is the radius of a circle with a diameter of 12?

What is 6

100

What is the diameter of a 20 inch pizza?

What is 20

100

The diameter for a circle is 15. What is the circumference?

What is 47.1

100

The radius for a circle is 9. What is the area?

What is 254.34

200

The distance from one side of a circle to the other. 

What is the Diameter

200

What is the radius of a 29 inch pizza?

What is 14.5 inches

200

What is the diameter of a circle with a radius of 20?

What is 40

200

The radius for a circle is 11.5. What is the circumference?

What is 72.22

200

The diameter for a circle is 22. What is the area?

What is 379.94

300

The distance around a circle

What is Circumference

300

The distance from one side of a cake to the other side is 12.5 inches. What is the distance from the center of the cake to the outside?

What is 6.25 inches

300

The distance from the middle of an apple pie to the outside is 10.62 cm. What is the distance from one side of the pie to the other?

What is 21.24 cm

300

What is the circumference of an 8-inch pizza?

What is 25.12 inches

300

What is the area of an 8-inch pizza?

What is 50.24

400

The total amount of space inside of a circle

What is the Area

400

If the diameter of a circle is 125.625, what is the radius?

What is 62.8125

400

If the radius of a circle is 194.87, what is the diameter?

What is 389.74

400

A Ferris wheel has a radius of 65 feet.  What is the distance traveled by a passenger in one full rotation of the Ferris wheel?

What is 408.2 feet

400

A lawn sprinkler sprays water 5 feet in every direction as it rotates. What amount of space on the lawn will get wet from the sprinkler?

What is 78.5

500

Circumference divided by diameter is what creates this number

What is Pi

500

The distance across a circular playground is 123.08 yards. What is the distance from the center of the playground to the edge?

What is 61.54 yards

500

The distance from the center of a circular fenced to the edge is 953.68 yards. What is the distance from one side of the yard to the other?

What is 1,907.36 yards

500

A circular swimming pool is 25.2 meters from the middle to the outside. What would be the distance if you wanted to swim around the outside of the pool?

What is 158.256 meters

500

A SEMI-CIRCLE shaped rug has a diameter of 7 feet. What is the area of the rug?

What is 19.2325