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Rhombus, square

All sides are congruent.

Parallelogram, rectangle, rhombus, square

Opposite sides are congruent.

Parallelogram, rectangle, rhombus, square

Opposite sides are parallel.

Parallelogram, rectangle, rhombus, square

Opposite angles are congruent.

Rectangle, square

All angles are right angles.

Parallelogram, rectangle, rhombus, square

Consecutive angles are supplementary.

Parallelogram, rectangle, rhombus, square

Diagonals bisect each other.

Rectangle, square

Diagonals are congruent.

Rhombus, square

Diagonals are perpendicular.

Rhombus, square

Each diagonal bisects opposite angles.