Can you describe a circle around any square?

In order to describe a circle around a quadrilateral, it is necessary that the sums of the opposite angles are 180 degrees. A square is a quadrangle in which all sides and angles are equal. In the square, the angles are right and their degree values are equal to 90 degrees, therefore the sums of the values of the opposite angles will be 90 + 90 = 180 degrees. It follows from this that a circle can be described around the square. This condition will always be met, regardless of what size the sides of the square are.