Diameter  Radius  Circumference  Area  Volume 

100What is 16?
It is the diameter of this shape.

100What is 3?
The radius of this circle.

100What is the distance around the circle or the perimeter?
The circumference is the same as this measurement.

100What is the inside of a circle?
This is what the area measures.

100What is V = pi•radius to the second power • height?
The formula for the volume of a circle.

200What is the center?
The diameter of a circle passes through this.

200What is r = d/2?
The formula for the radius of a circle is equal to this.

200What is C = (pi)•d?
The formula for circumference.

200What is A = pi X radius to the second power?
The formula for area of a circle.

200What is V = L • W • H?
The formula for the volume of a rectangular prism.

300What is two times the radius?
The diameter is equal to this.

300What is a point on the circle?
The radius of a circle joins the center of the circle to this.

300What is 12pi?
The circumference of a circle with a diameter of 12 (in terms of pi).

300What is 16pi?
The area of a circle with a radius of 4 (in terms of pi)?

300What is 672 cubic feet?
The formula of a rectangular prism with a length of 12 ft, a height of 8 ft, and a width of 7 ft.

400What is 74 cm?
The diameter of a circle when the radius is 37 cm.

400What is 75 ft?
The radius of a circle with a diameter of 150 ft.

400What is 21.98 inches?
The circumference of a circle with a diameter of 7 inches.

400What is 254.47 inches to the second power?
The area of a circle with a radius of 9 inches?

400What is 791.7 cubic inches?
The volume of a cylinder with a height of 7 inches and a diameter of 12 inches.

500What is 247.50 inches?
The diameter of a circle when the radius is 123.75 inches.

500What is 85.25 inches?
The radius of a circle with a diameter of 170.5 inches.

500What is 47.1 ft?
The circumference of a circle with a radius of 7.5 ft.

500What is 38.5 ft to the second power?
The area of a circle with a radius of 3.5 ft.

500What is 4 meters?
The height of a rectangular prism with a volume of 720 cubic meters, a width of 12 meters, and a length of 15 meters.
