Mathematics
A rectangle will not be a square, if :
adjacent sides are equal
angle between the diagonals is 90°
diagonals bisect each other and the angle between them is not 90°
all its sides are equal.
Quadrilaterals Constructions
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Answer
A rectangle will not be a square if its diagonals bisect each other and the angle between them is not 90°.
Hence, option 3 is the correct option.
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