Question

dear brainly friends, please do help me with this sum . i will be so thankful to you.

Answer 1

hope it helps you...
☺☺☺☺

Answer 2

In this Figure.. First We Join AD to BC.
and Lets Mark it as AM.

Now angle M(inside of AMB)=180°-(<A+<B)
=180°-80°=100°

Now In ∆DMC
<M=180-100°=80°

Now unsing the proof that The Sum of opposite interior angles = External Angle...

x=<M+<C
→X=80°+50°=130°


Hope it helps....