Respuesta :

Answer:

mΔ1 = 42°

mΔ2 = 42°

Step-by-step explanation:

Δ1 + 138° = 180°

Δ1 = 180° - 138°

Δ1 = 42°

______________

Δ2 + 138° = 180°

Δ2 = 180° - 138°

Δ2 = 42°

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