1. Areas of Parallelograms and Triangles
GEOMETRY LESSON 7-1
Pages Exercises
cm2 m2
in.2
4. 20 units2
5. 9 units2
6. 10 units2
7. 6 units2
10. 16 m2
yd2
13. 3 ft2
14. a ft2
b. Find the entire area of the lot and subtract the area for the flowers.
14. (continued)
c – 160 = ft2
units2
16. 6 units2
17. 6 units2
units2
units2
20. 3 units2 8 13
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2. Areas of Parallelograms and Triangles
GEOMETRY LESSON 7-1
units2
22. 4 in. cm
in.; 12 in.
25. a.
b units2
26. a.
b. 18 units2
27. a. 
b. 16 units2
28. a. 
b. 6 units2
29. The area does not change; the height and base AB do not change.
30. 8 units2
31. 9 units2
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3. Areas of Parallelograms and Triangles
GEOMETRY LESSON 7-1
32. 8 units2
yd2
34. Answers may vary. Sample:
35. a. Blank grid; area is 84 units2 while figures are 36 units2.
b. No; the figures have the same area.
units2
units2
units2
39. 9 units2
40. 6 units2
units2
units2
units2
ft2
cm2
46. 12,800 m2
in.2 m2
cm2
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4. Areas of Parallelograms and Triangles
GEOMETRY LESSON 7-1
ft2
51. a. 54 in.2
b. 54 in.2
52. B
53. G
54. A
55. F
56. [2] a.It is the distance between y = 2 and y = –3, so 2 – (–3) = 5.
b. 25 units2
[1] incorrect explanation OR incorrect answer
57. (a, a)
58. (a + c, b)
60. 72
61. 72
62. 36
63. 36
64. 36
65.
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5. Areas of Parallelograms and Triangles
GEOMETRY LESSON 7-1
66.
67.
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