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

What is 2.5

100

The radius of this is 5

What is 10

100

The diameter for this circle is 10

What is 31.4

100

The radius of this circle is 2

What is 12.56

200

The distance across a circle through the center.

What is the Diameter

200

The diameter is 12

What is 6

200

The radius of this circle is 22.5

What is 45?

200

The diameter for this circle is 13

What is 40.82

200

The radius of this circle is 3

What is 28.26

300
The point we name a circle after. 

What is the center point?

300

The diameter of this circle is 27

What is 13.5

300

The circumference of this circle is 15.7

What is 5

300

The diameter of this circle is 25

What is 78.5

300

The diameter of the circle is 16.

What is 200.96

400

The total amount of space inside of a circle

What is the area?

400

The circumference of a circle is 10pi.

What is 5?

400

The circumference of this circle is 18.84

What is 6

400

The radius for this circle is 45

What is 282.6

400

The diameter of the circle is 25

What is 490.625

500

3.14 or 22/7

What is pi?

500

The circumference of a circle is 314.

What is 50?

500

The circumference of this circle is 194.68

What is 62

500

The Diameter for this circle is 32.85

What is 3388.44465

500

The radius of this circle is 6955

What is 151888158.5