Answer:
A parallelogram is a quadrilateral whose opposite sides are parallel.
It's properties include:
- The opposite sides of a parallelogram are parallel.
- A diagonal of a parallelogram divides it into two congruent triangles.
- The opposite sides of a parallelogram are congruent.
- The opposite angles of a parallelogram are congruent.
- The consecutive angles of a parallelogram are supplementary.
- The diagonals of a parallelogram bisect each other.
