Page 67 - Steady Mate Tg1 - Book B

Matematik Tingkatan 1 Bab 10 Perimeter dan Luas

Luas Segi Tiga, Segi Empat Selari, Lelayang dan Trapezium
10.2 Area of Triangles, Parallelograms, Kites and Trapeziums BUKU TEKS ms. 231 – 238

C Anggarkan luas bagi setiap rajah yang berikut. TP 2 ARAS R
Estimate the area of each of the following diagrams.

Contoh 1. 2.
1 unit 1 unit
1 unit 1 unit 1 unit
1 unit ✓ ✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓ ✓ ✓
✓ ✓

Anggaran luas = 7 unit 2 Anggaran luas = 18 unit 2 Anggaran luas = 10 unit 2
Estimated area Estimated area Estimated area

MESTI TAHU & INGAT
1
Luas segi tiga = × tapak × tinggi
2
1
b Area of triangle = × base × height
2
1
= × a × b
a a a 2

D Hitung luas bagi setiap segi tiga yang berikut. TP 3 ARAS R
Calculate the area of each of the following triangles.

Contoh 1. 2.
8 cm

21 cm 6 cm
5 cm
18 cm
12 cm
1 Luas / Area = 1 × 8 × 6
Luas / Area = × 18 × 21 2
1 2
Luas / Area = × 12 × 5 2
2 = 189 cm 2 = 24 cm
= 30 cm 2

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