practice a - play with math – exercise your love for...

Name ________________________________ Date __________________ Class _________________

Practice A Perimeter

Find the perimeter of each figure. 1.

2.

______________________ ____________________

3.

4.

______________________ ____________________

Find the perimeter P of each rectangle. 5.

6.

7.

______________________ ___________________ _____________________

Find each unknown measure. 8. What is the length of side b if the 9. What is the length of side s if the

perimeter equals 30 in.? perimeter equals 45 yd?

_____________________ ____________________

10. A triangular rug has sides that measure 13 feet, 16 feet, and 12 feet. What is the perimeter of that rug? ______________________________

11. The perimeter of a rectangular swimming pool is 140 meters. The pool is 20 meters wide. How long is the pool? ______________________________

LESSON 9-7

Name ________________________________ Date __________________ Class _________________

Practice B Perimeter


2.

______________________ ____________________

3.

4.

______________________ ____________________


6.

7.

______________________ ___________________ _____________________

Find each unknown measure. 8. What is the length of side b if the

perimeter equals 47 in.?

______________________

9. What is the length of side s if the perimeter equals 119 yd?

____________________

10. Benjamin is putting a fence around his rectangular- shaped yard. The yard is 38 feet long and 27 feet wide. How many feet of fencing does Benjamin need to surround his entire yard? __________________________

11. If you drove from Bakersville to Salem and then to San Mateo, your entire 81-mile journey would form a triangle. The distance from Salem to San Mateo is 24 miles. The distance from Bakersville to San Mateo is 40 miles. How many miles is it from Salem to Bakersville? _________________________

LESSON 9-7

Name ________________________________ Date __________________ Class _________________

Practice C Perimeter

Find the perimeter of each regular polygon. 1.

2.

______________________ ____________________

3.

4.

______________________ ____________________


6.

7.

______________________ ___________________ _____________________

Find each unknown measure. 8. What is the length of side b if the

perimeter equals 1120 4 in.?

______________________

9. What is the length of side s if the perimeter equals 99.01 m?

____________________

10. Lydia used 24 feet of fencing to enclose her rectangular-shaped yard. Each side of the yard had a measurement in whole feet. What are all the possible dimensions of Lydia’s yard?

________________________________________________________________________________________

11. Why can you use the formula for the perimeter of a rectangle to find the perimeter of a square?

________________________________________________________________________________________

LESSON 9-7

Name ________________________________ Date __________________ Class _________________

Review for Mastery Perimeter

The perimeter of a figure is the distance around it. To find the perimeter of a figure, find the sum of the lengths of its sides. Look at the figure below. The perimeter is the sum of the lengths of its sides.

P = 2.3 + 1.5 + 3.4 + 4.2 = 11.4

So, the perimeter of the figure is 11.4 units.


2.

________________________ _________________________

If you know the perimeter of a figure, you can find the unknown length of a side.

The perimeter of the figure below is 94 units. To find the missing length, x, first find the sum of the known lengths.

23 + 18 + 20 + 11 = 72 Then subtract the sum from the perimeter.

94 − 72 = 22 So, side x is 22 units long.

Find the missing length for each figure. 3.

4.

Perimeter = 30 units Perimeter = 34 units

________________________ ________________________

LESSON 9-7

Name ________________________________ Date __________________ Class _________________

Challenge Perimeters Around the World

Find the perimeter of the base of each famous site.

Great Pyramid of Khufu, Giza, Egypt Pentagon, Arlington, Virginia

Perimeter: _____________________ Perimeter: _____________________

Parthenon, Athens, Greece Taj Mahal, Agra, India


Red Square, Moscow, Russia Hoover Dam, Arizona and Nevada


LESSON 9-7

Name ________________________________ Date __________________ Class _________________

Problem Solving Perimeter

Write the correct answer. 1. Use a ruler to find the perimeter of

your math textbook in inches.

_______________________________________

_______________________________________

3. The world’s largest flag weighs 3,000 pounds and requires at least 500 people to set up! This United States flag is 505 feet long and 255 feet wide. What is the perimeter of this United States flag?

_______________________________________

2. Use a ruler to find the perimeter of your desk in feet and inches.

_______________________________________

_______________________________________

4. Students in Lisbon, Ohio, built the world’s largest mousetrap in 1998. The mousetrap is 9 feet 10 inches long and 4 feet 5 inches wide—and it actually works! What is the perimeter of the mousetrap in feet and inches?

_______________________________________

Circle the letter of the correct answer. 5. The giant ball dropped every New

Year’s Eve in New York City is covered with 504 crystal equilateral triangles. The average perimeter of each triangle is 315 4

inches. What

is the average side length of each crystal triangle on the ball? A 5 inches

B 15 8 inches

C 15 4 inches

D 15 2 inches

7. The perimeter of regular octagon- shaped swimming pool is 42 feet. What is the length of each side of the pool? A 5 feet B 5 feet 3 inches C 5 feet 2 inches D 5.2 feet

6. United States dollar bills are 2.61 inches wide and 6.14 inches long. Larger notes in circulation before 1919 measured 3.125 inches wide by 7.4218 inches long. What is the difference between the old and new dollar bill perimeters? F 3.5936 inches G 3.9536 inches H 4.0956 inches J 4.5936 inches

8. Each Scrabble® tile is 1.8 centimeters wide and 2.1 centimeters tall. If the tiles spell the word LOVE, what is the perimeter of the entire word? F 7.8 cm G 18.6 cm H 12 cm J 31.2 cm

LESSON 9-7

Name ________________________________ Date __________________ Class _________________

Reading Strategies Use a Graphic Organizer

This chart will help you understand perimeter and how to measure it.

Definition The total distance around a figure.

Perimeter of Any Polygon Perimeter is the sum of the lengths of each side.

Perimeter of a Rectangle Perimeter is twice the length plus twice the width. P = 2 + 2

Perimeter of a Square

Perimeter is four times the length on one side. P = 4s

Use the graphic organizer to answer the following. 1. What name is given to the total distance around a figure?

________________________________________________________________________________________

2. How do you find the perimeter of a polygon?

________________________________________________________________________________________

3. Write the formula for finding the perimeter of a rectangle.

________________________________________________________________________________________

4. What does the letter stand for in the perimeter formula for a rectangle?

________________________________________________________________________________________

5. What does the letter s stand for in the perimeter formula for a square?

________________________________________________________________________________________

6. Why do you need the length of only one side of a square to find its perimeter?

________________________________________________________________________________________

LESSON 9-7

Perimeter

Name ________________________________ Date __________________ Class _________________

Puzzles, Twisters & Teasers Fancy Footwork

Find the perimeter of each figure and circle the letter next to the correct answer. To solve the riddle, match the letter of the correct answer to the number of the problem.

1.

I 7.5 ft B 1.5 ft P 15 ft L 12 ft

2.

P 39 cm T 47 cm U 37 cm J 38 cm

3.

F 2.9 m M 3.4 m D 3.9 m C 5.1 m

4.

S 14 mm R 16 mm V 12 mm Y 240 mm

5.

E 40 in. H 90 in. B 15 in. S 75 in.

6.

T 19.6 ft E 39.20 ft G 58.8 ft A 78.4 ft

What is sold by the yard, but worn by the foot? _____ _____ _____ _____ _____ _____ 3 6 4 1 5 2

LESSON 9-7

Name ________________________________ Date __________________ Class _________________

CODE

60907 Answers

LESSON 9-7

Practice A 1. 11 in. 2. 17 cm 3. 29 m 4. 53 ft 5. 18 yd 6. 42 ml 7. 74 ft 8. b = 9 in. 9. s = 15 yd 10 41 feet 11. 50 meters

Practice B 1. 65 in. 2. 111 cm 3. 141 m 4. 34.5 ft 5. 80 yd 6. 102 mi 7. 9 ft 8. b = 16 in. 9. s = 38 yd 10. 130 ft of fencing 11. 17 miles

Practice C 1. 21.5 in. 2. 63.6 cm 3. 107.1 m 4. 58 ft

5. 12 12

yd 6. 83.6 m

7. 49 715 ft 8. b = 29 38 in.

9. s = 21.38 m 10. 1 ft ⋅ 11 ft; 2 ft ⋅ 10 ft; 3 ft ⋅ 9 ft; 4 ft ⋅

8 ft; 5 ft ⋅ 7 ft; and 6 ft ⋅ 6 ft 11. because a square is a rectangle

Review for Mastery 1. 26 units 2. 30 units 3. x = 12 units 4. x = 6 units

Challenge Great Pyramid of Khufu: 964 m Pentagon: 4,608 ft Parthenon: 658 ft Taj Mahal: 228 m Red Square: 1,100 m Hoover Dam: 3,768 ft

Problem Solving 1. 39.5 inches 2. Answer depends on size of desk. 3. 1,520 feet 4. 28 feet 6 inches 5. C 6. F 7. B 8. G

Reading Strategies 1. perimeter 2. Add the lengths of each side. 3. 2! + 2 4. length 5. side 6. because all four sides are the same

length

Puzzles, Twisters & Teasers 1. P 2. T 3. C 4. R 5. E 6. A C A R P E T

practice a - play with math – exercise your love for...

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