Name ________________________________________ Date __________________ Class__________________
LESSON
4
Measurement and Geometry
Practice B: Area of Triangles and Trapezoids
Find the area of each triangle.
1.
2.
3.
4.
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Find the area of each trapezoid.
5.
6.
7.
8.
9. The front part of a tent is 8 feet long
and 5 feet tall. What is the area of the
front part of the tent?
8-31
Holt McDougal Mathematics
Practice B
1.
3.
5.
7.
9.
50 yd2
1.5 cm2
8 ft2
21 yd2
20 ft2
2.
4.
6.
8.
Puzzles, Twisters & Teasers
Practice C
1. 17.55 yd2
3.
5.
7.
9.
5 m2
15 ft2
15 cm2
52.7 cm2
7 2
ft
16
4. 8 in2
6. 37 cm2
8. 95.4 yd2
2. 8
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1.
3.
5.
7.
1.
3.
5.
7.
5 in2
12 ft2
24 yd2
8 ft2
1. 106 in2
3. 107 ft2
2.
4.
6.
8.
7 cm2
6 m2
17 mi2
18 ft2
2.
4.
6.
8.
80 cm2
12 yd2
108 m2
25 ft2
2. 13.4 m2
4. 322 yd2
3
5. 48 m2
6. 85.5 mi2
4
7. a door that is 7 feet tall and 3 feet
wide
2. 3 ft
4. B
6. A
Reading Strategies
36 in2
22.5 ft2
8.75 mi2
113 ft2
Practice C
Problem Solving
4 ft and 2 ft
9 ft2
H
J
A
D
U
S
Practice B
45 square inches
44 square inches
36 square inches
40 square inches
60 square inches
1
6. 42 square inches
2
7. BASEBALL, HOCKEY, GOLF,
BASKETBALL, FOOTBALL, SOCCER
1.
3.
5.
7.
2.
4.
6.
8.
Answers for Lesson 5
2. 6 square units
Challenge
1.
2.
3.
4.
5.
1. E
3. R
5. R
7. M
E A R D R U M S
Practice A
Review for Mastery
1. 12 square units
3. 18 square units
4. 160 square units
1
h(b1+ b2).
2
5. Substitute 4 for h, 6 for b1, and 8 for
b2. Add the lengths of the bases.
6. 28 in2
4. Use the formula A 
7 ft2
14 in2
17.2 m2
60 cm2
8. 99
7
yd2
16
Review for Mastery
1.
2.
3.
4.
1
1. Use the formula A 
bh.
2
2. Substitute 10 for b. Substitute 4 for h.
3. 20 in2
A21
15 square units
25 square units
21 square units
34 square units
Holt McDougal Mathematics