Respuesta :
Answer:
128
Step-by-step explanation:
A triangle's angles must add up to 180 degrees, so 180 = 40 + 12 + x which is the same as 180 - 40 - 12 = x
x = 128
Answer:
128
Step-by-step explanation:
A triangle's angles must add up to 180 degrees, so 180 = 40 + 12 + x which is the same as 180 - 40 - 12 = x
x = 128