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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
What is 2.5
100
The radius of this is 5
What is 10
100

The diameter of this circle is 10

The circumference is 31.4

100

The radius of this circle is 2

The area is12.56

200

A straight line that goes through the middle of a circle and touches the outside. 

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 40.82
200

The radius of this circle is 3

The area is 28.26

300

The equation to find the diameter

d = 2r

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 24

The circumference is 75.36

300

The radius of this circle is 21

The area 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 circumference of this circle is 18.84
What is 6
400

The radius for this circle is 25

Circumference is 157

400

The radius of this circle is 15

The area is 706.5

500

3.14 or 22/7

What is pi?

500
The diameter of this circle is 0.325
What is 0.1625
500
The diameter of this circle is 194.68
What is 62
500

The radius of the circle is 40

The circumference is 251.2

500

The diameter of this circle is 6

The area is 28.26