Name: ___________________________________________ Teacher/period: ____________________
Circles Test Review
1. Determine the circumference when the diameter is 32 cm. Use 3.14 for π.
2. Determine the diameter when the radius is 17 mm
3. A circular poster has a diameter of 62 inches. What is the radius of the poster?
4. A helicopter pad has a circumference of 24 yards. What is the radius of the helicopter
pad? Use 3 for π.
5. Determine the circumference when the radius is 8. Leave the answer in terms of π.
6. A ferris wheel at a carnival has a radius of 17 yards. What is the circumference? Use 3.14
for π.
7. Sarah painted a tabletop that is shaped like a circle. The circumference of the tabletop is
8π feet. Find the area of the table top in square feet. Round your answer to the nearest
tenth. Use 3.14 for π.
Page 2
8. The circular opening of a tunnel has a circumference of 60 meters. Write an equation
that can be used to find d, the diameter of the tunnel opening in meters?
9. Determine the area of a circle that has a radius of 14 inches. Use 3.14 for π.
10. Given that the circumference of the circle is 36 meters. Determine the diameter of the
circle. Use 3 for π.
11. Blake drew a circle and labeled the center as S. He used the expression (12)( π )to find
the circumference of the circle in inches. Circle which picture could Blake’s.
.
12. Determine the circumference when given the diameter. Use 3.14 for π.
Page 3
13. The diagram below models the length from the center of a wind turbine to the tip of
one of its blades. Use 3.14 for π.
Find the total area covered by the blade when the turbine makes 1 revolution? (Hint: Think
about how much 1 revolution equals!)
14. Find the area of the circle. Keep the answer in terms of π.
Matching:
A. radius
B. revolution
C. diameter
D. circumference
E. center
_____15. Line segment from the center of the circle to any point on the circle.
_____ 16. Equivalent to the circumference of the circle
_____ 17. The ________________ is the distance across a circle through its center.
______18. The distance around a circle.
_____ 19. A point that is the same distance from the outside to the inside of any circle.
Page 4
20. The diagram below shows the radius of the circular opening of a cup.
Which of the following is the closest to the circumference of the opening in cm? Use
3.14 for π.
21. Determine the area of the semicircle when given the radius is 6 cm. Use 3.14 for π.
Round to the nearest tenth.
22. Hannah wants to cover the rim of her circular pool with a foam covering. The foam
covering is sold in boxes that will cover 20 feet. How many boxes of foam will Hannah
need to cover the rim of the pool? Use 3.14 for π.