Answer Key
CHAPTER 7 Measurement
Lesson4

Activity (page 283)
A = 8
B = 4
C = 11
D = 16

On The Road to Learning (pages 288 to 290)
A.
1. 70 000
2. 23 000
3. 1.8694
4. 71
5. 4580
6. 0.65
7. 15 600
8. 0.9152
9. 309 500
10. 61.05

B.
1. 4.1 cm x 4.1 cm = 16.81 cm² or sq cm
2. 8 cm x 7 cm/2 = 28 cm² or sq cm
3. 12 cm x 5 cm = 60 cm² or sq. cm
4. 6 cm x 2.5 cm = 15 cm² or sq cm
5. 10 cm x 4 cm = 40 cm² or sq cm

C.
1. 0.64 m²
2. 18.75 m
3. Php 5000
4. square lot
5. 96 cm²

Creating My Math Word Corner (page 291)
Sample answers: area, square centimeter, square meter, problem, plan, solve, check

Showing What I Have Learned (page 291 to 294)
Accomplishing the Standard
A.
1. 18 cm² shaded part, 42 cm² unshaded
2. 8 cm² shaded part, 52 cm² unshaded
3. 27 cm² shaded part, 33 cm² unshaded
4. 37 cm² shaded part, 23 cm² unshaded
5. 9 cm² shaded part, 27 cm² unshaded

B.
1. A = 5 x 4 = 20
A2 = 3 x 9 = 27
A = 47 m2

2. 12 x 9/2 = 54 cm²

3. A = 400 + 175
= 575 m²

4. A = 15 x 10
= 150 cm²

5. A = 5 x 5 = 25 cm²
A = 25 cm² x 5
= 125 cm²

Understanding How I Learned (page 294)
Answers will vary. Possible answers:
1. I practiced a lot.
2. I memorized the formulas.
3. Nothing. I understood the lesson well.

Chapter 7