1.
Find the circumference of a circle whose radius is 49 cm. Use
for
.
A.
77 cm
B.
270 cm
C.
308 cm
D.
154 cm
Hint
2.
Find the circumference of a circle whose diameter is 13.5 meters. Use 3.14 for
.
A.
40.5 m
B.
45.9 m
C.
42.39 m
D.
46.12 m
Hint
3.
Find the area of a semicircle whose radius is 9 inches long.
(Use 3.14 for
.) Round to the nearest square inch.
A.
254 square inches
B.
41 square inches
C.
127 square inches
D.
81 square inches
Hint
4.
Many people like to walk the path of a labyrinth to relax. Boston College has a labyrinth that is enclosed in a circle that is 157 feet in circumference. Find the area of the labyrinth.
A.
about 1,270 square feet
B.
about 1,960 square feet
C.
about 2,540 square feet
D.
about 3,140 square feet
Hint
5.
Gabriela purchased 40 feet of fencing to make a circular dog pen. Find the area of the dog pen.
A.
about 130 square feet
B.
about 90 square feet
C.
about 110 square feet
D.
about 140 square feet
Hint