1. Trapezoid Special Notes!
The length of the mid-segment is the average of the lengths of the parallel sides.
Trapezoid
Definition: A quadrilateral with a pair of parallel sides.

2. Parallelogram Definition: A quadrilateral opposites sides parallel.
Special Notes!
Adjacent angles are supplementary.
Opposite sides are congruent.
Opposite angles are congruent.
Diagonals bisect each other.
Parallelogram

3. Isosceles Trapezoid
Definition: A quadrilateral with two parallel sides (called bases) whose non parallel sides are congruent.
Special Notes!
Angles adjacent about the non-base sides are supplementary!
Length of mid-segment is the average of the bases.

4. Rhombus Special Notes! Opposite sides are parallel.
All of the properties of a parallelogram hold! 
Diagonals are perpendicular.
Definition: A quadrilateral with four congruent sides.

5. Rectangle Special Notes! All the angles are right-angles.
All the properties of a parallelogram hold.
Rectangle
Definition: A parallelogram with one right angle.

6. Kite
Special Notes!
Angles between congruent sides are called vertex angles.
Angle between non-congruent sides are called non-vertex angles.
Diagonals are perpendicular.
The diagonal between non-vertex angles is bisected by the diagonal between vertex angles.
NON-VERTEX ANGLES
VERTEX ANGLES
Definition: A quadrilateral with two pairs of congruent adjacent sides.

7. Square Definition: A rhombus that is a rectangle. Special Notes!
Life's most perfect shape.
It a regular quadrilateral
All the properties of a parallelogram hold.
Diagonals are perpendicular.
A square is also a trapezoid.
A square is also a parallelogram.
A square is also a rhombus.
A square is also a rectangle.
A square is also a kite.
Square