Circles and Cylinders

1. Circumference

100

What is the formula for the Circumference of a Circle? 

C = 

2 Pi r

200

What is the circumference of a circle with a diameter of 9 cm? Use 3.14.

28.26 cm

300

What is the circumference of a circle with a radius of 9 cm? Use 3.14.

56.52 cm

400

What is the circumference of a circle with a diameter of 12.6 m? Use 3.14 for π and round to the nearest tenth.

39.6 m

500

What is the radius of a circle that has a circumference of 31.4?

5

2. Diameter & Radius

100

How do I convert a Diameter to a Radius? 

How do I convert a Radius to a Diameter? 

Diameter div 2

Radius * 2

200

What is the diameter of a circle with a radius of 15 cm?

30 cm

300

What is the radius of a circle with a circumference of 37 cm? (Use the 3.14 and round to the nearest tenth.)

5.9 cm

400

A machine makes circular paper plates that have a circumference of 50 cm. What is the diameter of each plate? (Use 3.14 and round your answer to the nearest tenth.)

15.9 cm

500

A tractor wheel has a circumference of 12 meters. What is the radius of the wheel? Use 3.14 and round your answer to the nearest tenth of a centimeter. 

1.9 m

3. Area of Circles

100

What is the formula for the Area of a Circle?

A = Pi r ^2

200

What is the area of a circle with a radius of 5 cm? Use 3.14

78.5 square centimeters

300

What is the area of a circle with a radius of 4.9 cm? Use 3.14

75.3914 square centimeters

400

What is the area of a circle with a diameter of 13 cm? Use 3.14.

132.665 square centimeters

500

What is the area of a circle with a radius of 4 cm? (Use the 3.14)

50.24 square centimeters

4. Surface Area of Cylinders

100

What is the formula for the Surface Area of a Cylinder? 

SA = 2 pi r h + 2 Pi r ^2

200

The net of a cylinder is made from what three shapes?

Two circles and a rectangle.

300

What is the surface area of a cylinder with a radius of 5 and a height of 10?  Use 3.14 for

pi

.  Round your answer to the nearest hundredth.

471 m²

400

Find the surface area of a cylinder that has a radius of 2 cm and a height of 5 cm. Use 3.14.

87.92 square centimeters

500

What is the surface area of a cylinder whose height is 3.8 meters and whose diameter is 6 meters? Leave your answer in terms of π

40.8 square meters

5. Volume of Cylinders

100

What is the formula for Volume of a Cylinder? 

V = Pi r ^2 h

200

What is the exact volume of a cylinder with a radius of 5 inches and a height of 10 inches? 

250 Pi 

300

What is the volume of a cylinder with a radius of 5 cm and a height of 12.2 cm? Use 3.14.

957.7 cubic centimeters

400

What is the volume of a cylinder with a diameter of 52.4 cm and a height of 36.9 cm? Use 3.14. Round to the nearest whole number.

79535 cubic centimeters

500

What is the volume of a cylinder with a radius of 3 cm and a height of 12 cm? (Use 3.14)

339.12 cubic centimeters