Relax

Respuesta :

your answer will be option D.
Step-by-step explanation:
123 + x = 180
x = 180 -123
x = 57

Answer:

57

Step-by-step explanation:

1+2=180

123+2=180

2=180-123

2=57

2=6=57 ( because 2 and 6 are 2 isotopic angles)