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Los angulos internos de un triangulo suman 180°
Angulo menor = x
Angulo mayor = 2x
Angulo del medio = x + 20°
x + 2x + x + 20° = 180°
4x + 20° = 180°
4x = 180° - 20°
4x = 160°
x = 160°/4
x = 40°
El angulo menor = x = 40°
El angulo mayor = 2x = 2 * 40° = 80°
El angulo del medio = x + 20° = 40° + 20° = 60°
Respuesta.
Loa angulos miden 40° , 60° y 80° respectivamente