What are the polygon attributes of a square?

A square has four sides of equal length, four equivalent inner angle measurements, has 2 pairs of parallel sides with the opposite sides being equal in length, has two diagonals that are equal in length and make 90 degree angles with each other, as well as 45 degree angles with the sides.

The side lengths of the square are measured by a, and they are all equal. Angles A, B, C, and D all form 90 degree angles. Lines DB and AC are diagonals that are equal in length, and they form four 90 degree angles at their intersection. They also make eight 45 degree angles on the corners of the square.