Circle Terms
Finding Radius
(find the radius for all)
Finding Diameter (Find Diameter for all)
Finding Circumference(Find Circumference for all)
Finding Area
(Find area for all)
1
The distance from the center of a circle to the outside, also half of the diameter
What is radius
1

The diameter of this circle is 5

What is 2.5

1
The radius of this is 5
What is 10
1

The diameter for this circle is 10 (round 1dp)

What is 31.4

1

The radius of this circle is 2 (round 2dp)

What is 12.57

2

The straight line passing through the center of a circle whose endpoints lie on the circle

What is the Diameter

2
The diameter is 12
What is 6
2
The radius of this circle is 2.5
What is 5
2

The diameter for this circle is 13 (round 2dp)

What is 40.84

2

The radius of this circle is 3 (round 2dp)

What is 28.27

3

The distance around a circle.

What is the circumference?

3
The diameter of this circle is 27
What is 13.5
3

The circumference of this circle is 15.7 (round to nearest whole number)

What is 5

3

The diameter of this circle is 25 (round 1dp)

What is 78.5

3

The radius of this circle is 21 (round 1dp)

What is 1385.4

4
The total amount of space inside of a circle
What is the area?
4
The diameter of this circle is 437
What is 218.5?
4

The circumference of this circle is 18.84 (round to nearest whole number)

What is 6

4

The radius for this circle is 45 (round 2dp)

What is 282.74

4

The diameter of this circle is 104 (round 2dp)

What is 8,494.87

5
3.14 or 22/7
What is pi?
5
The diameter of this circle is 0.325
What is 0.1625
5

The circumference of this circle is 194.68 (round to nearest whole number)

What is 62

5

The radius for this circle is 1642 (round to nearest whole number)

What is 10,317

5

The diameter of this circle is 401 (round to nearest whole number)

What is 126,293

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