Respuesta :

onizuka2003

Answer:

123

Step-by-step explanation:

180 - 57 = 123

supplementary

aleeshasaji

Answer:

∠6 = 123°

Step-by-step explanation:

∠1 = ∠4 because they are vertically opposite angles and vertically opposite angles are equal.

∠4 + ∠6 = 180 (same side interior angles are equal)

∠6 = 180 - 57

∠6 = 123°