tentukan nilai a dan b

➡Gambar 1

Sudut Garis lurus = 180°
Maka :

a + a + 68 = 180

2a = 180 - 68

2a = 112

a = 112/2

a = 56° ✔

➡Gambar 2

5b + 12 + 2b = 180
7b = 180 - 12
7b = 168
b = 168/7
b = 24° ✔



Jawaban bagian B :
➡Sudut DEG
= a + 68°
= 56° + 68°
= 124°

➡Sudut KLN
= 5b + 12°
= 5(24) + 12°
= 120° + 12°
= 132°


Semoga membantu...