x = 65
y = 71
z = 44
x is 65 because the two angles are vertices.
z is 44 because the unknown angle beside z and the vertice of x are corresponding angles.
So the unknown angle is 65
therefore, 180 - 71 - 65 = 44
finding y is easy now because two angles of the triangle are already figured out
180 - x - z = y
180 - 65 - 44 = y
y= 71
Hope this helps, I suck at explaining and also bad at English cuz I'm asian.