Circle Terms
Find the Radius
Find the Diameter
Find Circumference (2πr)
Find the Area (πr^2)
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
What is 2.5
100
The radius of this is 5
What is 10
100

The diameter for this circle is 10. What is the circumference? (2πr)

What is 31.4

100

The radius of this circle is 2. Find the Area (πr2)

What is 12.56

200

A straight line passing from side to side through the center of a body or figure,

What is the Diameter

200

The diameter is 12

What is 6

200

The radius of this circle is 2.5

What is 5

200

The diameter for this circle is 13. What is the circumference? (2πr)

What is 40.82

200

The radius of this circle is 3. Find the Area (πr2)

What is 28.26

300
A line through the circle.
What is a chord?
300
The diameter of this circle is 27
What is 13.5
300

The radius of a circle is 15.7 m

What is 31.4 m

300

The diameter of this circle is 25. What is the circumference? (2πr)

What is 78.5

300

The radius of this circle is 21. Find the Area (πr2)

What is 1384.74

400
The total amount of space inside of a circle
What is the area?
400
The diameter of this circle is 437
What is 218.5?
400

The radius of the circle is 4.5 cm

What is 9 cm

400

The radius for this circle is 45. What is the circumference? (2πr)

What is 282.6

400

The radius of this circle is 52.4. Find the Area (πr2)

What is 8621.6864

500

3.14 or 22/7

What is pi?

500
The diameter of this circle is 0.325
What is 0.1625
500

The radius of a circle is 11.14 ft

What is 22.28 ft

500

The Diameter for this circle is 3285. What is the circumference? (2πr)

What is 10314.9

500

The radius of this circle is 6955. Find the Area (πr2)

What is 151888158.5

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