What polygon is made up of four straight sides?

Has two bisecting diagonals.

Both pairs of opposite sides are parallel.

All Rhombuses are Squares.

All Squares are Parallelograms, Rhombuses AND Rectangles

Opposite angles are congruent.

Consecutive angles are supplementary.

Diagonals bisect each other.

Diagonals bisect opposite angles

Supplementary angles add to 180 degrees.

Complementary angles add to:

Lines that cross at 90 degree angles are

Has only one pair of parallel sides.

Has one pair of parallel sides and one pair of congruent sides.

Diagonals are congruent

One diagonal bisects the other.