Circles, Circles, Circles!

Circle Terms

100

The distance from the center of a circle to the outside, also half of the diameter

What is radius

200

The longest part in a circle. From one edge to the other through the center. 

What is the Diameter

300

The distance around the circle.

What is circumference?

400

The total amount of space inside of a circle

What is the area?

500

3.14 or 22/7

What is pi?

Finding Radius

100

The Diameter of this circle is 5. What is the radius?

What is 2.5

200

The diameter is 12. What is the radius?

What is 6

300

The diameter of this circle is 27. What is the radius?

What is 13.5

400

The diameter of this circle is 437. What is the radius?

What is 218.5?

500

The Circumference is 18.84 m. What is the radius?

3 m

Finding Diameter

100

The radius of this is 5. What is the diameter?

What is 10

200

The radius of this circle is 2.5. What is the diameter?

What is 5

300

The radius of this circle is 15.7. What is the diameter?

What is 31.4

400

The radius of this circle is 18.84. What is the diameter?

What is 37.68

500

The Circumference of this circle is 23.55 cm. What is the diameter?

7.5 cm

Finding Circumference

100

The diameter for this circle is 10. What is the circumference?

What is 31.4.

200

The diameter for this circle is 13. What is the circumference?

What is 40.82

300

The radius for this circle is 45. What is the circumference?

What is 282.6

400

The radius is 12.5. What is the circumference?

What is 78.5?

500

Find the PERIMETER of a SEMICIRCLE with a diameter of 12 in.

30.84 in

Finding Area

100

The radius of this circle is 3. What is the area?

What is 28.26

200

The diameter is 30. What is the area?

What is 706.5?

300

The diameter is 25.12. What is the area?

What is 495.35?

400

Find the AREA of a SEMICIRCLE with a radius of 7 ft.

76.93 ft²

500

Find the AREA of a SEMICIRCLE with a diameter of 10 cm

39.25 cm²