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Circle Terms
Finding Radius
(find the radius for all)
Finding Diameter (Find Diameter for all)
Finding Circumference(Find Circumference for all)
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

The Diameter of this circle is 5 feet

2.5 feet

100

The radius of this circle is 5 feet

10 feet

100

What is the circumference of the circle if the diameter is 10 cm? Round your answer to the nearest hundredth.

31.42 cm

100

If the radius of a circle is 2 ft, what is its area? Round your answer to the nearest hundredth.

12.57 square feet

200

The distance across the circle through the center.

What is the Diameter?

200

The diameter is 12 inches

6 inches

200

The radius of this circle is 2.5 inches

5 inches

200

What is the circumference of a circle with a diameter of 13 ft.? Round your answer to the nearest hundredth.

40.84 ft.

200

If the radius of a circle is 3 inches, what is its area? Round your answer to the nearest hundredth.

28.27 square inches

300

The distance around (perimeter) a circle.

What is the circumference?

300

The diameter of this circle is 27 feet

13.5 feet

300

The radius of this circle is 10 miles.

20 miles

300

If the diameter of a circle is 25 mm, what is its circumference? Round your answer to the nearest hundredth.

78.54 mm

300

What is the area of a circle with a diameter of 42 inches? Round your answer to the nearest hundredth.

1385.44 square inches

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

The diameter of this circle is 437 mm

218.5 mm

400

The radius of this circle is 18 inches

36 inches

400

What is the circumference of a circle if its radius is 50 inches? Round your answer to the nearest hundredth.

314.16 inches

400

What is the area of a circle with a radius of 50 feet? Round your answer to the nearest hundredth.

7853.98 square feet

500
3.14 or 22/7
What is pi?
500

The diameter of this circle is 0.325 inches

0.1625 inches

500

The radius of this circle is 194 cm

388 cm

500

What is the circumference of a circle if its radius is 75 cm? Round your answer to the nearest hundredth.

471.24 cm

500

What is the area of a circle with a diameter of 150 inches? Round your answer to the nearest hundredth.

17671.46 square inches