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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 8

What is 

4

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 that goes through the center

What is

diameter

200

The diameter of this circle is 27

What is 

13.5

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

The distance around a circle

What is

circumference?

300

The diameter of this circle is 437

What is 

218.5

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 radius of this circle is 21
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 0.325

What is 

0.1625

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 radius of this circle is 15
What is 706.5
500

3.14

What is 

pi?

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 20
What is 1256