2. Exemplar - Find the angle

1. \(ABCD\) is a parallelogram. If one diagonal divides it into two congruent right angle triangles, find the value of \( \angle ABC\).
 
Ans:  
 
 
2. If a quadrilateral has diagonals that bisect each other, it must be a parallelogram.
 
Ans: The given statement is
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