Besar sudut ACB pada gambar disamping adalah​

Sudut

(x + 50)° + (2x – 5)° – 45° = 180°

3x + 45° – 45° = 180°

x = 180°/3

x = 60°

Besar sudut ACB

= 180° – (2x – 5)°

= 180° – (2.60° – 5)

= 180° – 115°

= 65°