Step-by-step explanation:
consider 61°=m angle 8
angle 1=angle 8........ corresponding angle
angle 1=61°
angle 2+angle 1=180°.........angles in linear pair
180-61
angle 2=119°
angle 3=angle 8 alternate angle
angle 3=61°
angle 4=angle 2............ opposite angles
angle 4=119°
angle 5=angle 4......... alternate angles
angle 5=119°
angle 6=angle 8......... opposite angles
angle 6=61°
angle 7=angle 5.......... opposite angles
angle 7=119°
