1. Section 5-1
Parallelograms

2. Parallelogram
A Quadrilateral With BOTH Pairs Of Opposite Sides Parallel

3. Opposite sides of a parallelogram are congruent
Theorem 5-1
Opposite sides of a parallelogram are congruent H G F E

4. Opposite angles of a parallelogram are congruent
Theorem 5-2
Opposite angles of a parallelogram are congruent H G F E

5. Diagonals of a parallelogram bisect each other.
Theorem 5-3
Diagonals of a parallelogram bisect each other. H G M F E

6. TRUE OR FALSE?
Every parallelogram is a quadrilateral?
Every quadrilateral is a parallelogram?
Opposite sides of a parallelogram are congruent?
TRUE
FALSE
TRUE

7. TRUE OR FALSE?
All angles of parallelogram are congruent?
All sides of a parallelogram are congruent?
Opposite angles of a parallelogram are congruent?
FALSE
FALSE
TRUE