A square has four interior angles, each measuring 90°. All four sides of the square are equal in length, and the opposite sides are parallel to each other. The diagonals of the square bisect one another at a right angle (90°) and are equal in length. A square has four vertices and four sides, and its diagonals divide the square into two congruent isosceles triangles. Additionally, the length of the diagonals is greater than the length of its sides.