Page 52 - Steady Mate Tg1 - Book B

Matematik Tingkatan 1 Bab 8 Garis dan Sudut

E Cari nilai x bagi setiap yang berikut. TP 3 ARAS R
Find the value of .x in each of the following.

Contoh Contoh Contoh

Diberi ABC ialah sudut tegak. Diberi ABC ialah garis lurus.
Given that ABC is a right angle. Given that ABC is a straight line.
A 3x 2x
80°
x
x 45° 35°
A B C
73°
C B
45° + x + 35° = 180° 3x + 2x + 80° + 90° = 360°
x + 73° = 90° 5x = 190°
x = 90° – 73° x = 180° – 45° – 35° x = 38°
= 17° = 100°

1. 2. 3.
A B
51° C
x x x
93° 2x 3x
40° B x
C
10°
A
x + 51° = 90° 40° + 93° + x = 180° 3x + x + 2x + x + 10° = 360°
x = 90° – 51° x = 180° – 40° – 93°
= 39° 7x = 350°
= 47° x = 50°

F Selesaikan. TP 4 ARAS S
Solve.
Contoh 1.

b 36° 50°
25°
c a
a b
c

Diberi b dan 35° ialah sudut pelengkap, a dan b ialah sudut Diberi a dan 45° ialah sudut pelengkap, a dan b ialah

penggenap. Cari nilai a, b dan c. sudut penggenap. Cari nilai a, b dan c.
Given that b and 35° are complementary angles, a and b are Given that a and 45° are complementary angles, a and b are
supplementary angles. Find the values of a, b and c.
supplementary angles. Find the values of a, b and c.
b + 35° = 90° Sudut pelengkap a + 45° = 90°
b = 55° Complementary angles
a = 45°
a + b = 180° Sudut penggenap a + b = 180°
a + 55° = 180° Supplementary angles 45° + b = 180°
a = 125° b = 135°
c + a + 36° + b + 25° = 360° Sudut putaran lengkap
c + 125° + 36° + 55° + 25° = 360° Angle of one whole c + 135° + 50° + 90° + 45° = 360°
c = 119° turn c = 40°

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