Tutorial: Proving a Quadrilateral is a Parallelogram
It is important to be able to prove that a quadrilateral is a parallelogram based on the properties you have just learned. Watch the following tutorial to learn how to prove that a quadrilateral is in fact a parallelogram. Select the play button to begin the tutorial, and then use the navigation buttons to pause/stop, continue, or reset the tutorial. View the presentation as often as you would like, and take notes as you follow along. Be sure to set your volume at a reasonable level before you begin.
