Page 69 - Steady Mate Tg1 - Book B

Matematik Tingkatan 1 Bab 10 Perimeter dan Luas

Contoh 3. 4.
9 cm
6 cm
9 cm 6 cm
7 cm
11 cm

Luas / Area = 6 × 7 Luas / Area = 11 × 9 2 Luas / Area = 9 × 6 2

= 54 cm

= 42 cm 2 = 99 cm
F Hitung luas bagi setiap lelayang yang berikut. TP 3 ARAS R
Calculate the area of each of the following kites.
Contoh 1. 2.

4 cm 12 cm
6 cm

13 cm 7 cm
10 cm
1
Luas / Area = × 13 × 6 Luas / Area = 1 × 7 × 4 1
2 2 Luas / Area = 2 × 10 × 12
= 39 cm 2 = 14 cm 2 = 60 cm 2

MESTI TAHU & INGAT

a a Luas trapezium = 1 × (Hasil tambah panjang dua sisi yang selari) × tinggi
2
1
h h Area of trapezium = × (sum of lengths of two parallel sides) × height
2
b = 1 × (a + b) × h
b
2

G Hitung luas bagi setiap trapezium yang berikut. TP 3 ARAS R
Calculate the area of each of the following trapeziums.

Contoh 1. 2.
16 cm 6 cm
5 cm
10 cm 5 cm
4 cm
9 cm 16 cm
8 cm
1
1 Luas / Area = × (16 + 9) × 10 1
Luas / Area = × (5 + 8) × 4 2 Luas / Area = × (6 + 16) × 5
2 1 2
1 = × 25 × 10 1
= × 13 × 4 2 = × 22 × 5
2 2
= 125 cm 2 2
= 26 cm 2 = 55 cm

67 © Penerbitan Pelangi Sdn. Bhd.