matthew5340
matthew5340
13-04-2019
Mathematics
contestada
Angles and polygons
Respuesta :
KOAL
KOAL
13-04-2019
Answer:
∠1 = 66°
Step-by-step explanation:
∠1 + ∠3 = ∠4 (exterior angle theorem)
∠1 + 57° = 123°
∠1 = 66°
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