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Primer ángulo = m + 20
Segundo ángulo = m
m + 20 + m = 180
m + m + 20 = 180
2m = 180 - 20
2m = 160
m = 160/2
m = 80
m + 20 = 80 + 20 = 100
Solución :
Primer ángulo = 80°
Segundo ángulo = 100°