In the figure, if AB = AC and AD || BC, then x, y and z are respectively = _____.
x=70∘,y=55∘,z=55∘
AB || BC ..... (given)
z = ∠EAD = 55° ...... (corresponding abgles)
AB = AC ..... (given)
y = z = 55° ............ (base angles of an isosceles triangle)
In △ABC, x + y + z = 180° ..... (sum of angles of a triangle)
x = 180° - 55° - 55°
x = 70°