Diagonals are perpendicular. Opposite angles are equal. 2 pairs of parallel sides. 2 pairs of equal sides. Diagonals bisect each other i.e. cut each other exactly in half.
Diagonals are equal.
All angles are 90 o . 2 pairs of parallel sides. 4 equal sides. Diagonals bisect each other i.e. cut each other exactly in half. Diagonals are perpendicular.