Page 65 - Steady Mate Tg1 - Book A

Matematik Tingkatan 1 Bab 9 Poligon Asas

Contoh 4. 5. 6.

75°
80° 35° 102°

30° 70° 65° 40° 28°
55° 50°

Segi tiga bersudut tirus Segi tiga bersudut tirus Segi tiga bersudut tegak Segi tiga bersudut cakah
Acute-angled triangle Acute-angled triangle Right-angled triangle Obtuse-angled triangle

MESTI TAHU & INGAT

Hasil tambah sudut-sudut pedalaman ialah 180°. q
The sum of all the interior angles is 180°.
p r s
Hasil tambah sudut pedalaman dan sudut peluaran
bersebelahan ialah 180°. p + q + r = 180°
The sum of an interior angle and its adjacent exterior angle
is 180°.
r + s = 180°
Sudut peluaran adalah sama dengan hasil tambah dua
sudut pedalaman bertentangan. s = p + q
An exterior angle is the sum of two opposite interior angles.

C Cari nilai x untuk setiap yang berikut. TP 3 ARAS R
Find the value of x for each of the following.

Contoh 1. 2.
100° x

x
43°
x
36° 53°

x + 36° + 53° = 180° x + 43° + 100° = 180° x + x + 90° = 180°
x + 89° = 180° x + 143° = 180° 2x + 90° = 180°
x = 180° – 89° x = 180° – 143° 2x = 180° – 90°
x = 91° x = 37° 2x = 90°
x = 45°

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