Question

if l // m and angle 1 = 2x+y , angle 2 =x+2y and angle 3 = 3y +20, find angle 4 and 5 ?

Answer 1

angle 2 = angle 5 ( both r corresponding angle s )
hence angle 5 = x +2y
angle 4 = angle 1 ( suppose angle 1 has one angle vertically opposite to it then that angle will be corresponding angles with angle 4)
hence angle 4 = 2x+y