Oieee
Bom,
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b)
30° + 90° + x = 180°
120° + x = 180°
x = 180° - 120°
x = 60°
R) x = 60°
_
c)
65° + 50° + x = 180°
115° + x = 180°
x = 180° - 115°
x = 65°
R) x = 65°
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Qualquer dúvida me avise
A$$: MarcosPCV
