Page 7 - Modul A+1 Matematik Tambahan Tingkatan 5

2. Hitung jejari, j bagi setiap yang berikut.
Calculate the radius, j for each of the following. TP 2

Contoh/Example (a)
24.5 cm
10.2 cm Q
BAB 1 P Q 2.5 rad

j 1.5 rad
j O
O P
j = 10.2 j = 24.5
1.5 2.5
= 6.8 cm = 9.8 cm
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(b) (c)
15.7 cm
Q
j
0.7 rad
30.5 cm O P
O Q
j
P 3.1 rad
15.7
j = 2π – 3.1
j = 30.5
2π – 0.7 = 4.93 cm
= 5.46 cm

3. Hitung sudut, dalam radian, bagi setiap yang berikut.
Calculate the angle, in radians, for each of the following. TP 2

Contoh/Example

Gunakan/Use s = jq
14 cm Tip SPM
16 = 14q
θ 16 cm
q = 16 Simbol q dibaca sebagai “téta”.
14 The symbol q is read as “théta”.
= 8 rad
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(a) (b)
P 30.2 cm
P
12.3 cm 12 cm
θ
θ
O O
7.5 cm Q
Q 30.2
q = 12.3 q = 12
7.5 = 2.52 rad
= 1.64 rad

(c) Q (d)
θ 2π – q = 35 Q
11
11 cm
O q = 2π – 35 5 cm
P 11 θ
= 3.1 rad O P
π
35 cm q = rad
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