Applications For Triangles Worksheet With Answer Key - Garnet Valley School District Page 4
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16____ 21. decagon with side 4 cm
a.
b.
c.
d.
123.1 cm
129.4 cm
246.2 cm
139.8 cm
____ 22. dodecagon with perimeter 108 cm
a.
b.
c.
d.
1813.8 cm
906.9 cm
923.6 cm
938.9 cm
____ 23. pentagon with radius 8 m
a.
b.
c.
d.
304.3 m
152.2 m
30.4 m
154.2 m
____ 24. hexagon with radius 5 in.
a.
b.
c.
d.
259.8 in.
129.9 in.
65.0 in.
53.0 in.
____ 25. The Ruffs are planning to buy an above-ground swimming pool shaped as a regular octagon. The radius of the
octagon is 9 feet. To the nearest tenth, find the area of the surface of the water in the pool.
a.
b.
c.
d.
458.2 ft
553.1 ft
94.8 ft
229.1 ft
Find the area of the triangle. Give the answer to the nearest tenth. The drawing may not be to scale.
____ 26.
15 cm
???
9 cm
a.
b.
c.
d.
126.9 cm
63.4 cm
23.1 cm
185.5 cm
____ 27.
4.7 m
???
6.1 m
a.
b.
c.
d.
10.5 m
9.8 m
19.6 m
21.0 m
____ 28. A gardener needs to cultivate a triangular plot of land. One angle of the garden is 47 , and two sides adjacent
to the angle are 77 feet and 76 feet. To the nearest tenth, what is the area of the plot of land?
a.
b.
c.
d.
2163.5 ft
2139.9 ft
4279.9 ft
1995.5 ft
____ 29. A park in a subdivision is triangular-shaped. Two adjacent sides of the park are 573 feet and 536 feet. The
angle between the sides is 58 . To the nearest unit, find the area of the park in square yards.
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