Extra Practicesample Answers

Extra PracticeSample Answers

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Extra Practice 1– Master 4.36

Lesson 4.1

1.Nets will vary.

2.a) 6 congruent squares

b) 1 square, 4 congruent isosceles triangles

c)2 regular pentagons, 5 congruent isosceles triangles

3.Nets will vary.

Extra Practice 2 –Master 4.37

Lesson 4.2

The nets produce a rectangular pyramid, an equilateral

triangular prism, and a pentagonal prism.

Extra Practice 3 –Master 4.38

Lesson 4.3

1.314 m2

2.a)992 cm2

b)Tracy needs to buy 10 pieces, so the glass costs:
10 × $3.65 = $36.50

3.a)25 cm2

b)5 cm

4.13 150 cm2

Extra Practice 4–Master 4.39

Lesson 4.4

1.a)408 cm²

b)672 cm²

c)97.5 cm²

2.104 cm²

3.441.4 cm2

4.Right triangle

a)840 mm2

b)1740 mm2

Extra Practice 5 –Master 4.40

Lesson 4.5

1.360 m3

2.1 m by 1 m by 30 m

1 m by 2 m by 15 m

1 m by 3 m by 10 m

1 m by 5 m by 6 m

2 m by 3 m by 5 m

3.a)1.5 m

b)20 m3

Extra Practice 6 –Master 4.41

Lesson 4.6

1.a)150 cm3

b)720 cm3

c)1250 cm3

2.472.5 cm3

3.240 m3

4.a)15 cm2

b)For example: b = 5 cm, h = 6 cm

Extra Practice 7 –Master 4.42

Lesson 4.7

1.a)327 m2

b)919 cm2

c)22.1 m2

2.a)245 cm2

b)528 mm2

3. 244 cm2

4.a)13 cm

b)5 cm

c)565.5 cm2

Extra Practice 8 –Master 4.43

Lesson 4.8

1.a)63 cm3

b)85 m3

c)338.5 cm3

2.a)283 cm3

b)905 mm3

3.269.5 m3

4. 801.1 cm3

5.a)16 cm

b)39 789 cm3