In the diagram above, WXYZ is a rhombus and ∠WYX = 20^\circ. What is the value of ∠XZY
Attached Figure / Diagram
A
20o
B
30o
C
45o
D
60o
E
70o
Verified Correct Answer: E.
Step-by-Step Mathematical Solution
Diagonals bisect at 90^\circ; < YXZ = 90^\circ - 20^\circ = 70^\circ
But ZY = XY (sides of a rhombus)
\(\therefore\) < XYZ = 70^\circ (base angle of an isos. triangle)
Source: Myschool Past Questions Archive (Record #22674)