LESSON Practice A 10-3 Area of Composite Figures - Kennedy's Kids Math ...

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Date

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LESSON Practice A 10-3 Area of Composite Figures

Find the area of each polygon.

1.

2.

1 in.

2 in. 2 in.

5 in2

1 cm 1 cm

2 cm 3 cm

7 cm2

3.

1 ft

2 ft

4 ft

4. 3 m 2 m

2 m 3 m

12 ft2

6 m2

5.

2 yd

4 yd

4 yd

4 yd

242

6.

1 mi

5 mi 2 mi

6 mi

17 mi2

7. A rectangular painting is made up of two congruent squares with sides that measure 2 feet. What is the area of the entire painting?

8 ft2

8. A carpet is made up of two congruent triangles. The base of each triangle is 3 feet and the height is 6 feet. What is the area of the entire carpet?

18 ft2

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

20

Holt Mathematics

LESSON Puzzles, Twisters & Teasers 10-2 Hear, Hear!

Find the area of each figure below and circle the letter next to the correct answer. Write the letters over the number of the problem in the corresponding space in the riddle.

1.

2.

4

6

4

8

E 24 units2 B 26 units2 X 28 units2

3.

7

2

5

O 10 units2 R 12 units2 P 24 units2

5.

10

6

A 20 units2 F 24 units2 G 40 units2

4.

2

5.3

C 5.1 units2 Q 5.2 units2 D 5.3 units2

6.

6

2.5

14

L 24 units2 E 48 units2 R 72 units2

7.

V 4 units2 8.

4

U 5 units2

4.8

I 6 units2

4

2

10

M 20 units2 H 21 units2 W 40 units2

J 5 units2

2.2

N 6 units2 S 7 units2

What part of your body has the most rhythm?

E A RDRUMS

1. 2. 3. 4. 5. 6. 7. 8.

LESSON Practice A 10-3 Area of Composite Figures

Find the area of each polygon.

1.

2.

1 in.

2 in. 2 in.

5 in2

1 cm 1 cm

2 cm 3 cm

7 cm2

3.

1 ft

2 ft

4 ft

4. 3 m 2 m

2 m 3 m

12 ft2

6 m2

5.

2 yd

4 yd

4 yd

4 yd

6. 2 mi

1 mi 5 mi

6 mi

24 yd2

17 mi2

7. A rectangular painting is made up of two congruent squares with sides that measure 2 feet. What is the area of the entire painting?

8 ft2

8. A carpet is made up of two congruent triangles. The base of each triangle is 3 feet and the height is 6 feet. What is the area of the entire carpet?

18 ft2

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

19

Holt Mathematics

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

20

Holt Mathematics

LESSON Practice B 10-3 Area of Composite Figures

Find the area of each polygon.

1.

2.

2 in.

3 in.

9 in.

4 cm

8 cm

4 cm

4 cm

12 cm

36 in2

80 cm2

3. 4.5 ft 3 ft

2 ft 4.5 ft 4.5 ft

4.

2 yd

4 yd

4 yd

22.5 ft2

12 yd2

5. 2.5 mi

1 mi 2.5 mi 1 mi

8.75 mi2

6. 6 m

6 m 6m 6m

108 m2

7. Three paintings are shaped like an 8-foot square, a 7-foot by 4-foot rectangle, and a triangle with a 6-foot base and a height of 7 feet. If those paintings are hung together on the outside of a building, how much of the building's wall will they cover altogether?

113 ft2

8. Two diagonals divide a square carpet into 4 congruent triangles. The base of each triangle is 5 feet and the height is 2.5 feet. What is the area of the entire carpet?

25 ft2

LESSON Practice C 10-3 Area of Composite Figures

Find the area of each figure. The shaded parts are cut out of the figures.

1. 12 in.

2.

1 m

10 in. 7 in.

3.5 m

0.5 m 3.5 m 1.2 m

4 in.

106 in2

3. 20 ft 11 ft 13 ft 25 ft

13.4 m2

4.

2 yd 3 yd

16 yd

20.5 yd 3 yd

107 ft2

322 yd2

5.

3

1_ 2

m

2 m

10

1_ 2

m

6. 4 mi

3 mi 9 mi

5

1_ 2

m

12 mi

4834 m2

85.5 mi2

7. The front wall of the shed that Rita built is 9 feet tall and 514 feet wide. After she cut a section out for a door, the area of that wall was 2614 square feet. If the measurements of the doorway were

whole numbers of feet, what size door did Rita install?

a door that is 7 feet tall and 3 feet wide

8. The perimeter of a rectangular playground is 40 yards. It is 112 yards longer than it is wide. What is the area of that playground?

99 176 yd2

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

21

Holt Mathematics

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

22

Holt Mathematics

Copyright ? by Holt, Rinehart and Winston.

81

Holt Mathematics

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