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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)
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
200

This line segment goes through the center of the circle and has endpoints on the circle. 

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
300

The middle of the circle is called the 

Center

300
The diameter of this circle is 27
What is 13.5
300

The radius of this circle is 15.7

What is 31.4

300
The diameter of this circle is 25
What is 78.5
400

The ratio of the circumference to the diameter 

What is pi?

400
The diameter of this circle is 437
What is 218.5?
400

The radius of this circle is 1884

What is 3768

400
The radius for this circle is 45
What is 282.6
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 this circle is 5467.25

What is 10934.5

500
The Diameter for this circle is 3285
What is 10314.9