Parallelograms.

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Presentation transcript:

Parallelograms

5 Ways to Prove a Quadrilateral is a Parallelogram 1. Show both pairs of opposite sides are parallel.

5 Ways to Prove a Quadrilateral is a Parallelogram 2. Show both pairs of opposite sides are congruent.

5 Ways to Prove a Quadrilateral is a Parallelogram 3. Show both pairs of opposite angles are congruent.

5 Ways to Prove a Quadrilateral is a Parallelogram 4. Show one pair of opposite sides are congruent and parallel.

5 Ways to Prove a Quadrilateral is a Parallelogram 5. Show the diagonals bisect each other.

Example: Find the values of x and y

Example

Notecard 11: Consecutive angles in a parallelogram

Example: Find the measure of angle L