Whats the relationship between quadrilaterals and their symmetries?

For example, A square is a regular quadrilateral. All of its angles are equal (90°). All of its sides are of equal length. Opposite sides are parallel. The diagonals bisect each other at 90°. The diagonals are equal in length. It has 4 lines of symmetry. Order of rotational symmetry: 4.
hope this helps

They will be parallel. : ) 

than do 23.50 times 18 and then divide your answer by 100 than you will get x.

The answer is 4 points