1. Find the circumference of the circle. Leave answer in terms of .
2C r 2 7C
14C cm
1. Find the circumference of the circle. Leave answer in terms of .
C d12C in12 in
3. Find the perimeter. Leave answers in terms of pi.
8
P = CircleTwo segments +15 15P 830 8P un
4. A bike wheel has a diameter of 16 inches. If the wheel revolves 7 times, how far does the bike move?
16in
C d16C x 7 times
112 in
4. Find the area of the circle.
2A r 25A
25A 2cm
5. Find the area of the circle.
2A r 27A
49A 2in
7 7
6. Find the area of the shaded figure.
A Big little 2 2A R r
24A 2
216A 4
212A in
8. You want to design a new backyard for your family. The design is a rectangle with a semicircle on one end.
a. Find the area of the backyard. Show all work.
b. The backyard needs to be covered with grass. If the grass costs $3 per square foot, how much will it cost?
96A 8 ft2
96A 25.13121.13A
x $3
$363.39