Name
Class
Date
Practice 7-4
Areas of Trapezoids, Rhombuses, and Kites
Find the area of each trapezoid.
6 cm
1.
22 in.
2.
3.
4.4 ft
28 in.
6 cm
3.2 ft
10 cm
3 ft
34 in.
Find the area of each rhombus.
4.
5.
50
9m
6.
in.
17
f
t
11
f
t
40 in.
5m
Find the area of each kite.
7.
8.
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11 cm 9 cm
8 cm
9.
7.5 in.
7.5 in.
16 in.
6 ft
9 ft
7.5 in.
8 cm
6 ft
Find the area of each trapezoid. Leave your answers in simplest radical form.
10. A
6
B
13
E
11.
F 12.
Q
P
60
11
7
45
D
60
C
11
H
19
S
G
R
Find the area of each trapezoid to the nearest tenth.
13.
7 cm
14.
5 cm
11 cm
Geometry Chapter 7
20.6 in.
13 in.
15.
180 m
200 m
350 m
14.2 in.
Lesson 7-4 Practice
5
Chapter 7 Answers
Practice 7-1
1. 8
2. 8 3. 60
4. 240
5. 2.635
6. 1.92
7. 0.8125
8. 9
9. 1500
10. 8.75
11. 3.44
12. 7
13. 110
14. 30
15. 16
16. 119
17. 12
18. 48
19. 40
20. 56
Practice 7-2
1. " 51
5. 2 " 21
9. 35 " 114
13. 19 m
17. right
2. 4 " 7
3. 2 " 65
4. " 7
6. 18 " 2
7. 210 in.2
8. 24 " 10 cm2
2
ft
10. 46 in.
11. 78 ft
12. 279 cm
14. acute
15. right
16. obtuse
18. obtuse
19. acute
Practice 7-3
1. x = 2; y = " 3
3.
6.
2. a = 4.5; b = 4.5" 3
3
25"3
c = 50"
4. 8 " 2
5.
3 ;d = 3
28"3
7. 2
8. x = 15; y = 15 " 3
3
10. 42 cm
14. w
b=3
11. 5.9 in.
10"3
= 3 ;x =
12. 10.4 ft, 12 ft
5; y = 5 " 2 ; z
5 "3
= 3
14 " 2
9. 3 " 2
13. 170 in.2
2. 21.2
3. 49
6p
p
p
1
1
or 4
6. 8
7. 16 p or 16
10. 18
11. 89 p
12. 23 p
5p
63
25
15. 8 p
16. 3 p
17. p2
20. 10
16. p = 4 " 3; q = 4 " 3; r = 8; s = 4 " 6
Practice 7-8
3
7
1. 8.7%
2. 10.9%
3. 15.3%
4. 10
5. 10
1
2
1
6. 5
7. 10
8. 1
9. 5
10. 22.2%
11. 4.0%
12. 37.5%
13. 20%
14. 50%
15. 40%
16. 33 13 %
Reteaching 7-1
1. Samples:
4
4
6
3
6
2
Practice 7-6
8
5. 6 m
6. 8 ft
7. 4 in.
4
3
6
8
9. 5 in.
10. 23 cm
11. 9 ft
Reteaching 7-2
1.–2. Sample:
1 1
1. 32p
2. 16p
3. 7.8p
4. Samples: DFA , ABF
00
1 1
5. Samples: FE , FD
6. Samples: FEB , EDA
0 0
7. Samples: FE , ED
8. ⬔ACB
9. ⬔FCD
10. 32
11. 43
12. 54
13. 39
14. 71
15. 90
16. 50
17. 220
18. 140
19. 220
20. 130
21. 6p in.
22. 16p cm
23. 49 p m
Geometry Chapter 7
3
8
3. 20 cm2
4. 55 in.2
8. Samples:
8"3
8"3
= 3 ;d = 3
1. x = 7; y = 3.5 " 3
2. a = 60; c
3. p = 4 " 3; q = 8; x = 30
4. m⬔1 = 45; m⬔2 = 45;
m⬔3 = 90; m⬔4 = 90
5. m⬔5 = 60; m⬔6 = 30;
m⬔7 = 120
6. m⬔8 = 60; m⬔9 = 30; m⬔10 = 60
7. 12 " 3
8. 36.75 " 3
9. 75 " 3
10. 120 in.2
2
2
11. 137 in.
12. 97 in.
6
2. Samples:
12
Practice 7-5
4
6
4
1. 48 cm2
2. 784 in.2
3. 11.4 ft2
4. 90 m2
2
2
2
5. 2400 in.
6. 374 ft
7. 160 cm
8. 176.25 in.2
2
9. 54 ft
10. 42.5 square units
11. 96 " 3 square units
12. 36 " 3 square units
13. 45 cm2
14. 226.2 in.2
2
15. 49,500 m
4. 49
5. 14 p
6 p - 21.2
p
8. 16
- 81
9. 4p
15
13. 2 p
14. 6p
18. 3
19. 2
1. 49p
15. a = 4;
Practice 7-4
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Practice 7-7
3. Sample: 9, 16, and 25
4. They are equal.
5. The
sum of the squares of the two legs equals the square of the
6. 4 " 5
7. 7 " 2
8. 8
9. 6
hypotenuse.
Answers
39