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- 1. Multiple Choice
If the diameter of a circle is 4, what is the radius?
4
2π
4π
2
- 2. Multiple Choice
If r = 4, d = ?
4
2
8
8π
- 3. Multiple Choice
If d = 3, r = ?
6
3
1.5
1
- 4. Multiple Choice
Find the circumference of the circle in the image.
10π
20π
100π
20
- 5. Multiple Choice
What is the diameter of the circle in the image?
10
20π
20
100
- 6. Multiple Choice
What is the formula for finding the area of a circle?
- 7. Multiple Choice
What is the area of the circle in the image?
10
20π
100
100π
- 8. Multiple Choice
What is the radius of the circle in the image?
6
2
3
12
- 9. Multiple Choice
What is the area of the circle in the image?
9π
12π
12
36π
- 10. Multiple Choice
What is the circumference of the circle in the image?
6
6π
12π
36π
- 11. Multiple Choice
What does π equal?
3
3.14
3.2
21/7
- 12. Multiple Choice
Find the approximate area of the circle in the image.
63.585 square inches
81 square inches
20.25 square inches
254.34 square inches
- 13. Multiple Choice
What is the radius of the circle in the image?
9
4.5
81
20.25
- 14. Multiple Choice
Fill in the blank. The radius of a circle is equal to _________ its diameter.
half
twice
the square of
- 15. Multiple Choice
Fill in the blank. The circumference of a circle is the ________.
distance around it
space inside it
- 16. Multiple Choice
A circle as a circumference of 36π meters. What is the radius of the circle?
36 meters
6 meters
12 meters
18 meters
- 17. Multiple Choice
A circle has an area of 36π. What is the circumference of the circle?
18π
12π
6π
36π
- 18. Multiple Choice
A rose garden is circular. The diameter of the garden is 18 feet. What is the area of the garden?
9π square feet
36π square feet
81π square feet
324π square feet
- 19. Multiple Choice
A circular swimming pool has a radius of 15 feet. The family that owns the swimming pool wants to put up a circular fence that is 5 feet away from the pool at all points. What is the circumference of the fence they will need? Hint: Draw what you know.
15π
20π
40π
30π
- 20. Multiple Choice
A circular pin has a diameter of 6.2 centimeters. What is the area of the circle?
38.44π square cm
9.61 square cm
6.2π square cm
9.61π square cm
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