Respuesta :

Answer:

∠ 3 = 63°

Step-by-step explanation:

∠ 2 and ∠ 3 are adjacent angles and supplementary, thus

∠ 2 + ∠ 3 = 180°, that is

117° + ∠ 3 = 180° ( subtract 117° from both sides )

∠ 3 = 63°

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