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)
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.  Find the radius.

What is 2.5

100

The radius of this is 5.  Find the diameter.

What is 10

100

The diameter for this circle is 10.  Find the circumference.

What is 31.4

100

The radius of this circle is 2.  Find the area.

What is 12.56

200

The line going all the way across a circle through the center

What is the Diameter

200

The diameter is 12.  Find the radius.

What is 6

200

The radius of this circle is 2.5.  Find the diameter.

What is 5

200

The diameter for this circle is 13.  Find the circumference.

What is 40.82

200

The radius of this circle is 3.  Find the area.

What is 28.26

300

half of the diameter

What is a radius?

300

The diameter of this circle is 27. Find the radius. 

What is 13.5

300

The circumference of this circle is 15.7.  Find the diameter.

What is 5

300

The diameter of this circle is 25.  Find the circumference.

What is 78.5

300

The radius of this circle is 21.  Find the area.

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 437. Find the radius. 

What is 218.5?

400

The circumference of this circle is 18.84.  Find the diameter.

What is 6

400

The radius for this circle is 45.  Find the circumference.

What is 282.6

400

The radius of this circle is 52.4.  Find the area.

What is 8621.6864

500

The distance around a circle

What is circumference?

500

The diameter of this circle is 0.325.  Find the radius.

What is 0.1625

500

The diameter of this circle is 194.68.  Find the diameter.

What is 62

500

The Diameter for this circle is 3285.  Find the circumference.

What is 10314.9

500

The radius of this circle is 6955.  Find the area.

What is 151888158.5