Question

Pls answer this with vrief explanation

Answer 1

I hope my answer help you.
Plzz make me brainlist.

Answer 2

i hope it will help you
for figure I)

x+y=180-70=110
x=y, because opposite angle of equal side is equal.
so, x+x=110
2x=110
x=55° and y=x=55°
for figure ii)

y=50° x=y+50=50+50=100°
for figure iii)

y=30° and x=180-(30+30)=180-60=120°
for figure iv)
y=180-110=70° and x=180-(70+70)=180-140=40°
for figure v)

y=180-30=150° and x=180-(90+30)=180-120=30°
for figure vi)


x=180-y and x+180-y+80=180,x-y+80=0,x-y=-80,180-y-y=-80,180-2y=-80,180+80=2y,2y=260,y=130.°