Area and Circumference

Backwards

100

Find the radius given the circumference 50.24

8

200

Find the diameter given circumference of 125.6

20

300

Find the radius given the area 706.5

15

400

Find the diameter given the area is 803.84

32

500

Find the area of a circle if it's circumference is 81.64 ft.

113.04 ft

Word Problems

100

Find the circumference of a plate that has a diameter of 28 cm.

88 cm

200

A circular pendant has a diameter of 7 cm. Find the amount of space that the pendant occupies.

153.86 cm²

300

The radius of a bicycle wheel is 10.5 inches. Find the circumference of the wheel. 

65.94 in.

400

The radius of a cheeseburger is 2.5 inches. What's the area of the burger?

19.625 in²

500

The fence around the merry-go-round measures 56.52 feet. What's the distance from the fence to the center of the merry-go-round? 

9 feet.

Area

100

Find Area when Radius = 4

50.27

200

Find Area when Radius = 14

615.75

300

Find Area when Radius = 21

1,385.44

400

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

78.54

500

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

7,853.98

Circumference

100

Find circumference: When radius = 5

31.42

200

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

12.57

300

Find Circumference when Radius = 25

157.08

400

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

69.12

500

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

314.16

Semicircle/Quadrant

100

The radius of a quadrant is 4. What's the area?

12.56

200

The diameter of a semicircle is 10. What's the area of the semicircle?

39.25

300

Find the arc length of a semicircle that has a diameter of 12.

9.42

400

The shape of a floor mat is a semicircle. It is 76 cm across (through the center). Find the distance around the mat.

195.32 cm

500

Jessie ate a quarter of a pizza that measured 16 inches across. What is the area of pizza that's left over?

150.72