Area and Circumference

Radius/Diameter

100

If the radius is 5 what is the diameter?

10

200

A straight line passing from side to side through the center of a circle

Diameter

300

If the radius is 30 the diameter is?

60

400

If the diameter is 20 what is the radius?

10

500

What is the definition of radius?

A line segment that starts from the center of the circle to any point on the circle. It is half the diameter.

Circumference - Radius

100

Find circumference: When radius = 5

31.4

200

Find Circumference when Radius is 10

62.8

300

Find the circumference when the radius is 8.

50.24 inches

400

Find Circumference when Radius = 50 cm

314 cm

500

Abby has a circular walking path by her house. She looked on a map and saw the radius of the path was about 150 feet. If she walks around the path 4 times, about how far will she walk?

3768 feet

Area - Radius

100

Find Area when Radius = 4

50.24

200

Find Area when Radius = 14

615.44

300

Find Area when Radius = 21

1,384.74

400

Find Area when Radius = 35

3,846.5

500

Spell your Math teacher's last name.

Jauregui

Circumference - Diameter

100

What is the circumference of a circle with the diameter of 2?

6.28

200

What is the circumference of a circle with a diameter of 4?

12.56

300

What is the circumference of a circle with a diameter of 14?

43.96

400

What is the circumference of a circle with a diameter of 22?

69.08

500

What is your teacher's favorite football team?

Chicago Bears

Area - Diameter

100

What is the area of a circle with a diameter of 6?

28.26

200

What is the area of a circle with a diameter of 10?

78.5

300

What is the area of a circle with a diameter of 20?

314

400

What is the area of a circle with a diameter of 22?

379.94

500

What is the area of a circle with a diameter of 100?

7,850