Page 71 - Steady Mate Tg1 - Book A

Matematik Tingkatan 1 Bab 9 Poligon Asas

H Hitung nilai x dan y dalam setiap rajah yang berikut. TP 3 ARAS S
Calculate the values of x and y in each of the following diagrams.

Contoh 1. 2.
x y
x y 2x x
50° y 110°

Sudut bertentangan dalam segi 2x + x = 180°
x = 50° empat selari adalah sama. x = 110°
Opposite angles in a 3x = 180°
parallelogram are equal. y + 110° = 180° x = 60°
o
y + 50° = 180° Hasil tambah dua y = 180 – 110° y = x
y = 180° – 50° sudut bersebelahan = 70°
ialah 180 . o = 60°
= 130° Sum of two
adjacent angles is
o
180 .

I Hitung nilai x dalam setiap rajah yang berikut. TP 3 ARAS S
Calculate the value of x in each of the following diagrams.

Contoh 1. 2.
E D E
D 48° 66°
78°
E 105° x
125° 123° B C 15° 225°
A B x
x 50° C D
A B C A

Hasil tambah sudut
/EBC = 360° – 125° – 105° – 50° /ABD = 360° – 123° – 48° – 66° /BCE = 360° – 15° – 225° – 78°
= 80° pedalaman dan = 123° = 42°
sudut peluaran
x + 80° = 180° ialah 180 . x + 123° = 180° x + 42° = 180°
o

x = 180° – 80° Sum of interior x = 180° – 123° x = 180° – 42°
= 100° angle and exterior = 57° = 138°
angle is 180 . o

Contoh 3. 4.
80°
x
60°
x
117°

x
Sudut bertentangan x + 80° = 180° x + 117° = 180°
Opposite angles
= 60° x = 180° – 80° x = 180° – 117°
x + 60° = 180° = 100° = 63°
x = 180° – 60°
= 120°

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