Respuesta :

Here

  • NB||NA

Show sum of interior angles is 180°

[tex]\\ \sf\longmapsto <NBA+<NAB=180[/tex]

[tex]\\ \sf\longmapsto <NAB+103=180[/tex]

[tex]\\ \sf\longmapsto <NAB=180-103[/tex]

[tex]\\ \sf\longmapsto <NAB=77°[/tex]

MisterBrainly

Vertical angles are supplementary

We need m<NAB

  • 180-m<NBA
  • 180-103
  • 77°