ANSWER:

Opposite SIDES of a square are both parallel and EQUAL in length. All FOUR angles of a square are equal (each being 360°/4 = 90°, a right angle). All four sides of a square are equal. The diagonals of a square are equal.

Opposite sides of a square are both parallel and equal in length. All four angles of a square are equal (each being 360°/4 = 90°, a right angle). All four sides of a square are equal. The diagonals of a square are equal.Internal angle (degrees): 90°

Opposite sides of a square are both parallel and equal in length. All four angles of a square are equal (each being 360°/4 = 90°, a right angle). All four sides of a square are equal. The diagonals of a square are equal.Internal angle (degrees): 90°Edges and VERTICES: 4

Opposite sides of a square are both parallel and equal in length. All four angles of a square are equal (each being 360°/4 = 90°, a right angle). All four sides of a square are equal. The diagonals of a square are equal.Internal angle (degrees): 90°Edges and vertices: 4Dual polygon: Self