4) Calcular "x"
x + 2x + 180° - x + 90° = 360°
2x + 270° = 360°
2x = 360° - 270°
2x = 90°
x = 90°/2
x = 45°
El valor de "x" es 45° alternativa c)45°
5) Calcular "x"
120° + 80° + x + x = 360°
200° + 2x = 360°
2x = 360° - 200°
2x = 160°
x = 160°/2
x = 80°
El valor de "x" es 80° alternativa b) 80
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4) Calcular "x"
x + 2x + 180° - x + 90° = 360°
2x + 270° = 360°
2x = 360° - 270°
2x = 90°
x = 90°/2
x = 45°
El valor de "x" es 45° alternativa c)45°
5) Calcular "x"
120° + 80° + x + x = 360°
200° + 2x = 360°
2x = 360° - 200°
2x = 160°
x = 160°/2
x = 80°
El valor de "x" es 80° alternativa b) 80