Page 669 - Basic College Mathematics with Early Integers

646 C HAPTE R 9 I GEOMETRY

Solve. See Examples 1 through 7.

13. A polygon has sides of length 5 feet, 3 feet, 2 feet, 14. A triangle has sides of length 8 inches, 12 inches,
7 feet, and 4 feet. Find its perimeter. and 10 inches. Find its perimeter.

For Exercises 15 and 16, see the art to the right of these
exercises.
Outfield (grass)
Foul Foul
15. A line-marking machine lays down lime powder to line line
mark both foul lines on a baseball field. If each foul
line for this field measures 312 feet, how many feet of 2nd base
lime powder will be deposited? Infield
(dirt)
Pitcher’s
16. A baseball diamond has 4 sides, with each side length mound
90 feet. If a baseball player hits a home run, how far 3rd base 1st base
does the player run (home plate, around the bases,
then back to home plate)?
Home plate

17. If a football field is 53 yards wide and 120 yards long, 18. A stop sign has eight equal sides of length
what is the perimeter? 12 inches. Find its perimeter.

53 yd

120 yd

19. A metal strip is being installed around a workbench 20. Find how much fencing is needed to enclose a
that is 8 feet long and 3 feet wide. Find how much rectangular garden 70 feet by 21 feet.
stripping is needed for this project.

21. If the stripping in Exercise 19 costs $2.50 per foot, 22. If the fencing in Exercise 20 costs $2 per foot, find
find the total cost of the stripping. the total cost of the fencing.

23. A regular octagon has a side length of 9 inches. Find 24. A regular pentagon has a side length of 14 meters.
its perimeter. Find its perimeter.

25. Find the perimeter of the top of a square compact disc 26. Find the perimeter of a square ceramic tile with a
case if the length of one side is 7 inches. side of length 3 inches.

27. A rectangular room measures 10 feet by 11 feet. Find 28. A rectangular house measures 85 feet by 70 feet.
the cost of installing a strip of wallpaper around the Find the cost of installing gutters around the
room if the wallpaper costs $0.86 per foot. house if the cost is $2.36 per foot.

Find the perimeter of each figure. See Example 6.

29. 17 m 30. 13 in. 31. 3 ft 4 ft

6 in. 5 ft
13 in.
28 m 6 ft Copyright 2012 Pearson Education, Inc.
20 m 15 ft
30 in.

20 m