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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

r2 = 4

What is 12.56

200

3.14

What is pi?

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

The space in the middle of a circle.

What is area?

300

The diameter of this circle is 0.325

What is 0.1625?

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 longest chord in a circle, goes from edge to edge through the center.

What is diameter?

400

The circumference of this circle is 314

What is 50?

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

The radius is 25

What is 157?

400

The diameter of this circle is 30

What is 706.5

500

A line through a circle from edge to edge, going through ANY point.

What is a chord?

500

The circumference of this circle is 59.66 cm.

What is 9.5 cm?

500

The area of this circle is 706.5

What is 15?

500

r2 = 144

What is 75.36?

500

The circumference of this circle is 43.96

What is 153.86?