Properties of parallellogram

Answer 1

1. Area is base x height 2. Area is 2x the area of triangle created from diagonals 3.Opposite sides are equal 4. Opposite angles are equal 5. Diagonals create congruent triangles when they bisect each other 6. Ares is equal to the cross product/2 of the two sides viewed as vectors 7. Diagonals bisect each other 8. There are two sets of parallel lines 9. It is a quadrilateral 10. adjacent angles are supplementary ie =180 degrees And there are more!