Circle Terms
Finding Radius
Finding Diameter
Circumference
Area
100
The distance from the center of a circle to the outside, also half of the diameter
What is radius
100

The diameter of a circle is 5.  What is the radius?

What is 2.5

100

The radius of a circle is 5.  What is the diameter?

What is 10

100

The diameter of a circle is 10. What is the circumference?


What is 31.4

100

The radius of this circle is 2.  What is the area?

What is 12.56

200

A line that passes through the center point and connects two points on the edge.

What is the Diameter

200

The diameter of a circle is 12.  What is the radius?

What is 6

200

The radius of the circle is 2.5.  What is the diameter?

What is 5

200

The diameter of the circle is 13. What is the circumference?

What is 40.82

200

The radius of this circle is 3.  What is the area?

What is 28.26

300

The distance around the circle. 

What is a circumference

300

The diameter of the circle is 27. What is the radius?

What is 13.5

300

The radius of a circle is 5.8.  What is the diameter?

What is 11.6

300

The radius of the circle is 25.  What is the circumference?

What is 157

300

The radius of this circle is 17.  What is the area?

907.46

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

The diameter of a circle is 56. What is the radius?

What is 28

400

The radius of a circle is 35.  What is the diameter?

What is 70

400

What is the formula for circumference, when given the radius?

C= 2 x 3.14 x r

400

The diameter of a circle is 36.  What is the area?

What is 1,017.36

500
3.14 or 22/7
What is pi?
500

How do you solve for the radius when given the diameter?

Diameter divided by 2

500

How do you solve for the diameter when given the radius of a circle?

Radius x 2

500

What is the formula for circumference, when given the diameter?

C= 3.14 x d

500

What is the formula for area of a circle?

A= 3.14 x r x r

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