Find Parallelogram Properties

Parallelogram Properties Move the vertices to see what happens to the parallelogram as it changes. You need to find four properties that remain constant regardless of the size of the parallelogram as long as it is convex.
Find Properties for Parallelograms with regards to these aspects of the parallelogram: Angles: 1.) Vertical Angles - 2.) Consecutive Angles - Diagonals: 1.) Sides: 1.)