Chapter 5 -- Quadrilaterals Section 5-1 – parallelograms
Definition of a Parallelogram A quadrilateral with parallel opposite sides Note: parallel sides mean same-side interior angles are supplementary. Complete Sample Problem 1
Properties of parallelograms Opposite sides of a parallelogram are congruent. Complete Sample Problem 2
Properties of parallelograms Opposite angles of a parallelogram are congruent. Complete Sample Problem 3
Properties of parallelograms Diagonals of a parallelogram bisect each other. Complete Sample Problem 4