Answer: 
Explanation: Since, here WXYZ is a kite where
and 
Thus according to the property of a kite ,
Exactly one pair of opposite angles are equal and The main diagonal bisects a pair of opposite angles.
Therefore, In kite WXYZ ,
-------(1)
And, WY is the angle bisector of kite WXYZ.
So,
( because WY bisects
into two equal angles
and
)
⇒
-----(2)
Similarly, 
⇒
-----(3)
Since, WXYZ is a kite ⇒
-------(4)
Therefore, From equation (1), (2), (3) and (4),
We get, 