Circle Terms
Finding Radius and Diameter
Finding Area
Finding Circumference
100

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

What is the radius?

100

The radius of a circle whose diameter is 27 meters.

What is 13.5 meters?

100

The radius of this circle is 5 feet.

What is 78.5 square feet?

100

The radius for this circle is 5 km.

What is 31.4 km?

200

The longest part in a circle. From one edge to the other through the center. 

What is the Diameter

200

The diameter of a circle whose radius is 12 km.

What is 24 km?

200

The radius of this circle is 2.5 cm.

What is 19.625 square cm?

200

The diameter for this circle is 13 inches.

What is 40.82 inches?

300

The distance around the circle.

What is circumference?

300

The radius of a circle whose circumference is 25.12 inches.

What is 4 inches?

300

The diameter of this circle is 15.7 micrometers.

What is 193.49 square micrometers?

300

The radius of this circle is 25 feet.

What is 157 feet?

400
The total amount of space inside of a circle
What is the area?
400

The radius of a circle whose area is 78.5 square miles.

What is 5 miles?

400

The diameter of this circle is 2.12 inches.

What is 3.53 square inches?

400

The diameter for this circle is 45 yards.

What is 141.3 yards?

500
3.14 or 22/7
What is pi?
500

The radius of a circle whose circumference is 62.8 cm.

What is 10 cm?

500

The circumference of this circle is 194.68 miles.

What is 3,015 miles?

500

The circumference of a circle whose area is 452.16 square yards.

What is 75.3 yards?