Answer Key
CHAPTER 7 Measurement
Lesson 5
On the Road to Learning (pages 297 and 298)
A.
1. sphere
2. cone
3. cylinder
4. cube
5. rectangular prism
6. triangular pyramid
7. triangular prism
8. square pyramid
B.
1. sphere
2. cylinder
3. cylinder
4. triangular prism
5. cubes
6. triangular pyramid
7. cone
8. rectangular prism
9. cones
C. Answers may vary. Possible answers:
1. Gift box
2. Show box
3. Paper weight
4. Glass
5. Ball
6. Ice cream cone
7. Tomb
On the Road to Learning (pages 301 and 302)
A.
1. V = 9 x 5 x 7 = 315 cm³
2. V = 9 x 9 x 9 = 729 cm³
3. V = 4 x 12 x 4/2 = 192 cm³
4. V = 10 x 20 x 30 = 6000 cm³
5. V = 7 x 7 x 7 = 343 cm³
B.
1. 42. 875 cm³
2. 89.25 cm³
3. 22.68 dm³
4. 3.6 m³
5. 16.8 m³
C.
1. 864 cm³
2. 144 m³
3. 3.825 m³
4. 33.750 cm³
5. 0.375 m³
Creating My Math Word Corner (page 304)
Sample answers: sphere, cone, cylinder, cube, triangular pyramid, rectangular prism, square pyramid
Showing What I Have Learned (pages 304 and 305)
Accomplishing the Standard
A.
1. True
2. False
3. True
4. True
5. False
6. True
7. False
8. True
9. True
10. True
B.
1. cylinder
2. cone
3. cube
4. sphere
5. triangular pyramid
C.
1. 1 331 cm³
2. 1.080 cm³
3. 1331 cm³ (Note: Please change 11 m to 11 cm)
4. 187.5 cm³
Extending Beyond The Standard
1. 70 cm
2. 60 cm
3. 80 cm
4. 50 cm
5. 336, 000 cm³
6. 210 000 cm³
Understanding How I Learned (page 306)
Answers will vary. Possible answers:
1. Yes, because it is important for me to know the volume of the objects I have at home.
2. I memorized the formulas.
3. Nothing. I understood the lesson well.
Assessing My Skills (pages 307 to 310)
1. c
2. a (Please note correction: the given is 1240
cm2 and not 12401)
3. d
4. d
5. d
6. a
7. a
8. c
9. b
10. d (Note: Please change the given to 106.8 m)
11. c
12. d
13. b
14. c
15. b
16. b
17. d
18. a
19. (Note: Please change the options to a. 125
cm3; b. 250 cm3; c. 300 cm3; and d. 400 cm3.
The answer is c. 300 cm3)
20. c
21. d (Please note correction: the given must be
1.24 m3)
22. b
23. b
24. b
25. a
CHAPTER 7 Measurement
Lesson 5
On the Road to Learning (pages 297 and 298)
A.
1. sphere
2. cone
3. cylinder
4. cube
5. rectangular prism
6. triangular pyramid
7. triangular prism
8. square pyramid
B.
1. sphere
2. cylinder
3. cylinder
4. triangular prism
5. cubes
6. triangular pyramid
7. cone
8. rectangular prism
9. cones
C. Answers may vary. Possible answers:
1. Gift box
2. Show box
3. Paper weight
4. Glass
5. Ball
6. Ice cream cone
7. Tomb
On the Road to Learning (pages 301 and 302)
A.
1. V = 9 x 5 x 7 = 315 cm³
2. V = 9 x 9 x 9 = 729 cm³
3. V = 4 x 12 x 4/2 = 192 cm³
4. V = 10 x 20 x 30 = 6000 cm³
5. V = 7 x 7 x 7 = 343 cm³
B.
1. 42. 875 cm³
2. 89.25 cm³
3. 22.68 dm³
4. 3.6 m³
5. 16.8 m³
C.
1. 864 cm³
2. 144 m³
3. 3.825 m³
4. 33.750 cm³
5. 0.375 m³
Creating My Math Word Corner (page 304)
Sample answers: sphere, cone, cylinder, cube, triangular pyramid, rectangular prism, square pyramid
Showing What I Have Learned (pages 304 and 305)
Accomplishing the Standard
A.
1. True
2. False
3. True
4. True
5. False
6. True
7. False
8. True
9. True
10. True
B.
1. cylinder
2. cone
3. cube
4. sphere
5. triangular pyramid
C.
1. 1 331 cm³
2. 1.080 cm³
3. 1331 cm³ (Note: Please change 11 m to 11 cm)
4. 187.5 cm³
Extending Beyond The Standard
1. 70 cm
2. 60 cm
3. 80 cm
4. 50 cm
5. 336, 000 cm³
6. 210 000 cm³
Understanding How I Learned (page 306)
Answers will vary. Possible answers:
1. Yes, because it is important for me to know the volume of the objects I have at home.
2. I memorized the formulas.
3. Nothing. I understood the lesson well.
Assessing My Skills (pages 307 to 310)
1. c
2. a (Please note correction: the given is 1240
cm2 and not 12401)
3. d
4. d
5. d
6. a
7. a
8. c
9. b
10. d (Note: Please change the given to 106.8 m)
11. c
12. d
13. b
14. c
15. b
16. b
17. d
18. a
19. (Note: Please change the options to a. 125
cm3; b. 250 cm3; c. 300 cm3; and d. 400 cm3.
The answer is c. 300 cm3)
20. c
21. d (Please note correction: the given must be
1.24 m3)
22. b
23. b
24. b
25. a