In the diagram above, WXYZ is a rhombus and ∠WYX = 20°. What is the value of ∠XZY
A.
20o
B.
30o
C.
45o
D.
60o
E.
70o
Correct answer is E
Diagonals bisect at 90°; < YXZ = 90° - 20° = 70°
But ZY = XY (sides of a rhombus)
\(\therefore\) < XYZ = 70° (base angle of an isos. triangle)