What is a quadrilateral??

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Presentation transcript:

What is a quadrilateral?? What makes them special? What are some special quads? What are properties that some have but others do not?

Formal Definition

ABCD is a parallelogram Find AD Find angle B

In pairs…

Summary: Properties of Parallelograms Property Parallelogram Rectangle Rhombus Square Trapezoid Kite Opposite sides are parallel Opposite sides are congruent Opposite angles are congruent Diagonals are congruent Diagonals are perpendicular Diagonals bisect each other All angles are right angles. All sides are congruent.

Example Proof

Proof Solution