Question

hallar =α + β .....................

Answer 1

Respuesta:

          140°  

Explicación paso a paso:

β+ β + 20° + 40° = 180°

2 β + 60° = 180°

2 β = 180° - 60°

2 β = 120°

β = 60°

α + β+40° = 180°

α + 60° + 40° = 180°

α + 100° = 180°

α = 180° - 100°

α = 80°

Luego; α + β  = 80° + 60° = 140°