Question

Given triangle map with angle 1 angle 2 and angle 3 . Line XAY parallel to line MP. To prove that angle 1 angle 2 and angle 3 equal to 180 degree

Answer 1

angle xab+ angle a+angle yac=180(linear pair)
line xay is parallel to line mp
so,
angle xab=angle b(alternate angle)
angle yac =angle c(alternate angle)
so,
angle a+angle b+angle c=180