Question

Please help!

I think the third statement (z=t) is right but I'm not sure...

I. x=z
II. y=w
III. z=t

A) I and II only
B) I and III only
C) II and III only
D) I, II, and III

Answer 1

Your answer should be B)

Answer 2

I and III seem to be correct, II doesn't because, for example, if x = w = z = t = 70 and y = u = 40, then all three pairs of vertical angles in the figure have equal measure and the given condition x + y = u + w stands. But it means y is not equal to w.