Question

We cannot construct a square if:

• A. a side is given
• B. a diagonal is given
• C. one angle is ${90}^0$
• D. None of these

Answer 1

The correct option is C one angle is ${90}^0$

If a side is given then we can draw a square with the same side as given.

If diagonals are given, by joining the endpoints we can draw the square.

In square, all angles are of ${90}^o$.

If one angle is ${90}^o$ is given, we can't directly conclude that all the angles are ${90}^o$.

Hence, if one angle is ${90}^o$ then we cannot construct a square.