Basics
Formula Fun
Real World Circles
Solve-It!
Missing Pieces
100

The name of the distance around a circle

What is the circumference?

100

The formula to find the circumference using radius.

What is C=2πr

100

If a bicycle wheel has a diameter of 24 inches, what is the circumference?

What is 75.36 inches?

100

Find the circumference when the radius is 4 inches.

What is 25.12 inches?

100

If the circumference of a circle is 31.4 inches, what is the diameter?

What is 10 inches?

200

The distance from the center of a circle to the edge

What is the radius?


200

The formula to find the circumference using diameter.

What is C=πd?

200

A round swimming pool has a radius of 10 feet. Find the circumference.

What is 62.8 feet?

200

Find the circumference when the diameter is 10 cm.

What is 31.4 cm?

200

A circle has a circumference of 62.8 cm. Find the radius.

What is 10 cm?

300

The distance across a circle through its center

What is the diameter?


300

The circumference of a circle when r=7

What is C≈43.96 ?

300

A clock face has a diameter of 30 cm. What is the circumference?

What is 94.2 cm?

300

A circular table has a radius of 6 feet. Find its circumference.

What is 37.68 feet?

300

The circumference of a plate is 44 cm. What is the diameter?

What is 14 cm?

400

The constant value represented by the Greek letter π (pi)

What is 3.14?

400

The circumference of a circle when d=20

What is C = 62.8?

400

The tire of a car has a radius of 14 inches. Find the circumference.

What is 87.92 inches?

400

A wheel has a diameter of 16 inches. Find the circumference.

What is 50.24 inches?

400

A wheel has a circumference of 125.6 inches. What is the radius?

What is 20 inches?

500

A circle’s circumference is most similar to this measurement of a square.

What is the perimeter?

500

If the radius of a circle is 7 inches, what is the circumference? 

What is 43.96 inches?

500

A dinner plate has a diameter of 12 inches. Find the circumference.

What is 37.68 inches?

500

The circumference of a hula hoop with a 9-inch radius.

What is 56.52 inches?

500

A Ferris wheel has a circumference of 188.4 feet. What is the radius?

What is 30 feet?

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