1. Circles Review Use this to study for the Ch. 8 Test! ? ?
Name _______________________________
Date ________________ Period B____, G _____
Circles Review
Use this to study for the Ch. 8 Test!
Fill in the blanks below with the correct information for #1-#2.
Formula for Circumference of a Circle
1) C = __  d
Formula for Area of a Circle
2) A = π  __ .
___________
____________
3) What does the bottom of the rectangle represent in a circle? ?
4) What does the side of the rectangle represent in a circle? ?
Find the circumference in terms of pi. 5)
9.4 mm

2. Find the circumference. Use 3.14 or for pi.
____________
9) _____________
Find the circumference. Use 3.14 or for pi. 6)
13 ft
Find the area in terms of pi. 7)
8 in
Find the area. Use 3.14 or for pi. 8)
17 in 9)
Circumference = in
What is the diameter?
(use 3.14 for pi)

3. Find the area in terms of pi.
10) ______________
11) _____________
12) _____________
13) _____________
10)
Area = cm
What is the radius?
(use 3.14 for pi)
11) A lawn sprinkler sprays water 12 feet in every direction as it rotates in a circle. How many square feet of the grass gets watered? Use or 3.14 for .
12) The distance from the center of a carousel to the outside is 16 feet. What is the distance around the carousel? Write your answer in terms of pi.
Find the area in terms of pi.
13)
6 mm

4. 14) π is the amount of diameters around a circle
True or False?
14) π is the amount of diameters around a circle
15) The diameter of a circle is double the radius
14) _____________
15) _____________
16) ______________
17) ______________
_____________
Find the diameter and radius for each circle.
9 cm
16)
24 cm
17)
d = ____
r = ____
d = ____
r = ____
Find the missing part of the circle given either the radius or diameter.
18) Radius = 22 feet
Diameter = _____
19) Diameter = 22 inches
Radius = _____
Find the circumference in terms of pi.
20)
17 ft