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Perimeter of Polygons Practice Questions

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Updated on Oct 5, 2011

Review the following concept if necessary: Perimeter of Polygons Study Guide

Problems

Find the perimeter of each polygon.

Use a formula to find the perimeter of each polygon.

1. square: s = 20 cm
2. parallalogram: l = 5 ft, w = 10ft.
3. rectangle: l = 12 in., w = 6 in.
4. regular octagon: s = 10 in.
5. regular nonagon: s = 7 ft.

Find the length of the indicated side(s).

Find answers to these practical problems.

1. Suppose you want to frame an 8-inch by 10-inch picture. How much molding will you need to buy?
2. A fence must be placed around your vegetable garden. The dimensions of the garden are 30 feet by 10 feet. How much fencing will you need?
3. You have a square dining room that you would like to trim with crown molding. If the length of the room is 17 feet, how much crown molding should you purchase?
4. Suppose you want to hang holiday icicle lights around your house. If your house is 32 feet by 40 feet and one package of lights is 9 feet long, how many packages of lights should you buy?
5. Suppose a bookshelf has three shelves that are each 3 feet long by 1 foot tall. You have books that are all 2 in. wide by 12 in. tall. How many of your books will fit in the bookcase?
6. You have a wall that is 9 ft. tall that you want to cover with posters. The posters you like each measure 3 ft. by 3 ft. If you bought 15 posters and placed them next to each other from floor to ceiling on the wall, how wide would the portion of the wall covered posters be?

1. 21
2. 36
3. 24
4. 33
5. 30
6. 22 in.
7. 21
8. 18 cm
9. 36 ft.
10. 26 cm
11. 80 cm
12. 30 ft.
13. 36 in.
14. 80 in.
15. 63 ft.
16. w = 1 m; l = 5 m
17. w = 5 cm; l = 10 cm
18. s = 7 in.
19. s = 8 yd.
20. s = 20 cm
21. s = 10 cm
22. s = 8 cm
23. s = 23 cm
24. 11 cm
25. 36 in.
26. 80 ft.
27. 68 ft.
28. 16 packages
29. 54 books (18 on each shelf)
30. 15 ft.

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