6.1-6.4+summary+notes

Qualifications of Special Quadrilaterals (Parallelograms) Parallelograms: |||| Rhombuses:
 * Opposite sides are parallel
 * Opposite sides are congruent
 * Opposite angles are congruent
 * Diagonals bisect each other
 * One angle is supplementary to both consecutive angles
 * //(Proof) One pair of sides can be congruent and parallel to prove it is a parallelogram//
 * All of the qualifications of a parallelogram
 * All four sides are congruent
 * The diagonals bisect the angles
 * Diagonals are perpendicular (bisectors of each other)
 * Rectangles:
 * All of the qualifications of a parallelogram
 * Diagonals are congruent
 * Has four right angles ||
 * |||| Squares:
 * All of the qualifications of a parallelogram, rectangle, and rhombus
 * It is only a square if it is both a rhombus and a rectangle (all equal sides make it not a rectangle; diagonals that are perpendicular bisectors and angle bisectors make it not a rectangle) ||  ||

Other Quadrilaterals: Trapezoids, Kites, etc.