1. Parallelogram
Definition: A quadrilateral with two pairs of parallel sides.
Picture: Marked parallel and congruent.

2. The Parallelogram Family
Squares, Rectangles and Rhombuses share ALL of the Properties of the Parallelogram.

3. Parallelogram Opposite Angle Conjecture
Conjecture: The opposite angles of a parallelogram are congruent.
Picture:

4. Parallelograms Consecutive Angles Conjecture
Conjecture: The consecutive angles of a parallelogram are supplementary.
Picture: ∠B and ∠C are congurent and ∠A and ∠E are congurent

5. Parallelogram Opposite Sides Conjecture
Conjecture: The opposite sides of a parallelogram are congruent.
Picture:

6. Parallelogram Diagonals Conjecture
Conjecture: The diagonals of a parallelogram bisect each other.
Picture:

7. Let’s Practice…

8. Let’s Practice…

9. Let’s Practice…

10. Let’s Practice…

11. Let’s Practice…