Circle Terms
Radius
Diameter
Circumference
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. Find the radius. 

What is 2.5

100

The radius of this is 5. Use 3.14 for pi. Find the diameter. 

What is 10

100

The diameter for this circle is 10. Use 3.14 for pi. Find the Circumference. 

What is 31.4

100

The radius of this circle is 2. Use 3.14 for pi. Find the Area. 

What is 12.56

200

The perimeter

What is the circumference

200

The diameter is 12. Find the radius. 

What is 6

200

The radius of this circle is 2.5. Use 3.14 for pi. Find the diameter. 

What is 5

200

The diameter for this circle is 13. Use 3.14 for pi. Find the Circumference. 

What is 40.82

200

The radius of this circle is 3. Use 3.14 for pi. Find the Area. 

What is 28.26

300

A line through the circle.

What is a diameter?

300

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

What is 13.5

300

The circumference of this circle is 15.7. Use 3.14 for pi. Find the diameter. 

What is 5

300

The diameter of this circle is 25. Use 3.14 for pi. Find the Circumference. 

What is 78.5

300

The radius of this circle is 21. Use 3.14 for pi. 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. Use 3.14 for pi. Find the diameter. 

What is 6

400

The radius for this circle is 45. Use 3.14 for pi. Find the  Circumference. 

What is 282.6

400

The radius of this circle is 52.4. Use 3.14 for pi. Find the Area.

What is 8621.6864

500
3.14 or 22/7
What is pi?
500

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

What is 0.1625

500

The circumference of this circle is 194.68. Use 3.14 for pi. Find the diameter.

What is 62

500

The diameter for this circle is 3285.  Use 3.14 for pi. Find the Circumference.

What is 10314.9

500

The circumference is 314. Use 3.14 for pi. Find the area.

7,850