SQUARE

SQUARE

• The diagonals of a square bisect each other and meet at 90°
• The diagonals of a square bisect its angles.
• The diagonals of a square are perpendicular.
• Opposite sides of a square are both parallel and equal in length.
• All four angles of a square are equal.
• All four sides of a square are equal.
• The diagonals of a square are equal.
• The perimeter of the square = 4a (* a is the length of any one side)
• The area of the square = a x a

Bibliography :

• Web Page of BBC
• Wikipedia 
• Web Page of Math Open Reference