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Radius
Diameter
Circumference
Area
Challenge
100
The diameter of a circle is 10, the radius is...
What is 5.
100
The radius is 5, the diameter is...
What is 10?
100
The circumference of a circle that has a diameter of 2 is...
What is 6.28?
100
The area of a circle that has a radius of 5 is...
What is 78.5?
100

The distance all the way across a circle.

What is the diameter?

200
The diameter is 100, the radius is...
What is 50
200
The radius is 20, the diameter is...
What is 40?
200
The circumference of a circle that has a diameter of 4 is...
What is 12.56?
200

The area of a cirlce that has a radius of 10 is...

What is 314?

200
The distance half way across the circle.
What is the radius?
300
The diameter is 15, the radius is...
What is 7.5?
300
The diameter is 4.5, the radius is...
What is 9?
300
What is the circumference of a circle that has a radius of 5???
What is 31.4?
300
The area of a circle that has a radius of 9 is...
What is 254.34?
300
The distance around the outside of a circle.
What is the circumference?
400
The diameter is 25, the radius is...
What is 12.5?
400
The radius is 10.5, the diameter is...
What is 21?
400
The circumference of a circle that has a 4.5 is...
What is 28.26?
400
The area of a circle with a diameter of 10 is...
What is 78.5?
400
The amount of space inside a circle.
What is the area?
500
The diameter is 0.5, the radius is...
What is 0.25?
500
The radius is 1.15, the diameter is...
What is 2.3?
500
The circumference of a circle that has a diameter of 12.5 is...
What is 29.25?
500
The area of a circle with a diameter of 100 is...
What is 7850?
500
How are perimeter and circumference similar?
They both measure the distance around the outside of something.