SOLUTION
A square is a four-sided shape or plane figure which has all its sides equal in length and all the interior angles (4 interior angles) equal in length.
A square has the following properties
1. All four sides of a square are equal in length
2. All four interior angles of a square are equal. Each being equal to 90 degrees.
3. The opposite sides of a square are both parallel and equal in length.
4. The diagonals of a square bisect its angles.
5. The diagonals of a square bisect each other and meet at 90 degrees.
A square is shown in the image below