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quadrilateral family tree

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Parallelogram
Opposite sides are parallel, opposite sides are congruent, opp angles are congruent, diagnols bisect each other, consecutive angeles are supplementary
Rhombus
all sides are congruent, al properties of parallelogram, diagnols are perpendicular, diagnols bisect each angle
Rectangle
all angles are 90 all properties of a parallelogram, diagnols are congruent
Square
all properties of a parallelogram, all properties of a rectangle, all properties of a rhombus
trapezoid
1 pair of opposite sides are parallel, median has parallel bases, med=b+b/2
Isosceles trapezoid
all properties of trapezoid, legs are congruent, base angles are congruent, diagnols are congruent