Question

Find the value of unknown angle in the diagram

Answer 1

as we know the some of 2 opposite interior angle is equal to the exterior angle
50 +60=110
the value of A =110

Answer 2

by angle sum property of triangle
angle 3+ 50° +60°= 180°
angle 3 = 70°
angle 3+angle x =180°[linear pair]
angle x = 180-70
x=110°