Circle Terms
Finding Radius
Finding Diameter
Finding Circumference
Finding 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 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 or 10π 

100

The radius of this circle is 2

What is 12.56 or 4π 

200
The longest chord in a 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 or 13π 

200

The radius of this circle is 3

What is 28.26 or 9π 

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

The circumference of this circle is 5π 

What is 5

300

The diameter of this circle is 25

What is 78.5 or 25π 

300

The radius of this circle is 21

What is 1384.74 or 441π 

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

The circumference of this circle is 16π

What is 8?

400

The circumference of this circle is 234π 

What is 234

400

The radius for this circle is 45

What is 282.6 or 90π 

400

The diameter of this circle is 10

What is 78.5 or 25π

500

3.14

What is pi?

500

The circumference of this circle is 14π 

What is 7

500

The circumference of this circle is 62π 

What is 62

500

The radius for this circle is 14

What is 87.92 or 28π 

500

 The circumference of a circle is 26π

What is 530.66 or 169π

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