Respuesta :

zfranks05

Answer:

The answer is b=128

Step-by-step explanation:

25+27=52

180-52=128

johnkayle17

Answer:

∠A + ∠B + ∠C = 180°

⇒ 25° + 27° + ∠B= 180°

⇒ 52° + ∠B= 180°

Subtract both sides by 172°

⇒ 52° – 52° + ∠B = 180° – 52°

Therefore, ∠B = 128°