Maths-
General
Easy
Question
What additional information is necessary to prove that the given triangles are congruent by AAS postulate?
Hint:
A pair of vertically opposite angles are always equal to each other.
The correct answer is: we need BAE = DCE
In the figure, side BE = ED
Since a pair of vertically opposite angles are always equal to each other, it implies that
So, we have got a side and an angle. To prove the triangles are congruent by AAS congruency postulate we need one more angle such that the side BE is not included.
So, we need 
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