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Circle Vocab
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
100
The radius of this circle is 2
What is 12.56
200

Distance from one side of the circle to the other side through the center.

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
What is 28.26
300

What is pi? 

Circumference divided by diameter or

Distance around divided by distance across

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 this circle is 42

What 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 45
What is 282.6
400

Find the area of a semicircle with a radius of 6

What is 56.5

500

What is the volume of a cylinder with a radius of 3 cm and a height of 20 cm?

180π or 565.5 cm3

500

The diameter of this circle is 0.32

What is 0.16

500
The diameter of this circle is 194.68
What is 62
500
The radius for this circle is 25
What is 157
500

The radius of this circle is r

What is r2 x π