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(b) Estimation: 11.5 cm Self Practice 10.3b (ii) Q = {3, 6, 9, 12, 15, 18,
Perimeter: 12.3 cm 2 21, 24}
The difference between the 1. 420.25 m (iii) Q = {x : x is a multiple
2
estimated value and the actual 2. 93.75 cm of 3 and x , 25}
2
value is small, therefore the 3. 48 cm 2. (a) True
estimated value is accurate.
Mastery 10.3 (b) False
Self Practice 10.1c (c) True
1. 128 cm (d) False
1. 76 m
2. Draw a square with length of
2. RM1 720 side of 12 cm. The area is Self Practice 11.1c
2
3. 22 cm 144 cm . 1. (a)  (b) 
(c)  (d) 
2
3. 432 cm
Mastery 10.1 2. (a)  (b) 
4. 875 m
2
1. 9 m (c)  (d) 
Let’s Practise (e)  (f) 
2. 42 cm
3. Perimeter of shape A 1. 41 cm Self Practice 11.1d
= x + y + 6 + (y – 5) + (x – 6) + 5 2. 30 cm 1. (a) n(A) = 5 (b) n(B) = 5
2
= (2x + 2y) cm 3. 81 cm (c) n(C) = 3 (d) n(D) = 9
Perimeter of shape B 4. (a) 24 cm
2
= x + y + 3 + (y – 2) + (x – 3) + 2 (b) 4.8 cm 2. (a) 6 (b) 7
= (2x + 2y) cm 5. 111.5 cm 2 Self Practice 11.1e
Thus, perimeters of both the 6. 42 cm
shapes A and B are equal. 1. (a) Yes (b) No
7. (a) 4 cm (c) No (d) Yes
4. RM24 000
(b) 32 cm
5. 6 cm 8. 25 cm Mastery 11.1
2
Self Practice 10.2b 9. Form a square with length of 1. (a) X is the set of vowels.
side of 7.5 cm.
1
1. (a) mn (b) tk 10. Fence up a region with a length (b) Y is the set of perfect
2 squares which are less than
1 1 of 22.5 m and a width of 20 m;
(c) (p + q)r (d) st 50.
2 2 85 m
2. (a) P = {Mercury, Venus,
Self Practice 10.2c Earth, Mars, Jupiter, Saturn,
2
1. (a) 15 cm (b) 24.5 cm Chapter 11 Introduction of Set Uranus, Neptune}
2
2
2
(c) 16.8 cm (d) 24 cm Self Practice 11.1a (b) Q = {2, 3, 5}
2. 146 m 2 1. Land transport: car, lorry, van, 3. (a) G = {x : x is a month which
bus begins with the letter ‘M’}
Mastery 10.2
Water transport: sampan, boat, (b) H = {x : x is a multiple of 7

2
2. 1 550 m ship, ferry and 1 < x < 100}
3. 122.5 cm Air transport: rocket, aeroplane, 4. (a) Yes
2
4. 75.25 cm helicopter, hot-air balloon (b) No
2
(c) No
Self Practice 10.3a Self Practice 11.1b (d) Yes
1. T, S, Q, R, P 1. (a) (i) P is the set of colours 5. n(A) = 3, n(B) = 13, n(C) = 5
The bigger the difference of the rainbow
between the length and the (ii) P = {red, orange, 6. 2
width of the rectangle, the yellow, green, blue, Self Practice 11.2a
smaller the area. indigo, violet}
1. (a) Universal set
2. P, R, T, S, Q (iii) P = {x : x is a colour of
The bigger the difference the rainbow} (b) Not a universal set
between the length and the (b) (i) Q is the set of multiples (c) Universal set
width of the rectangle, the of 3 which are less than 2. (a) P9 = {0, 1, 2, 4, 5, 7, 8}
bigger the perimeter. 25. (b) Q9 = {0, 1, 4, 6, 8, 9}
320
Answers
14 Ans Math F1.indd 320 11/10/16 12:23 PM