In this slide show properties of quadrilaterals are explored and several examples modeling problems involving quadrilaterals are worked out. This slide show is from Glencoe- McGraw Hill.

In this eight-and-a-half-minute video, Sal Khan, of Khan Academy, discusses the basics of quadrilaterals including such as parallelograms, rectangles, rhombi, and squares.

This lesson emphasizes the properties of the quadrilaterals in the hierarchy including parallelograms, rhombi, rectangles, squares, kites and trapezoids. Venn diagrams are used to show the relationship among the figures.

From YouTube, produced by Volunteer State Community College

This Power Point presentation demonstrates how to name quadrilaterals and discusses the sides and angles of quadrilateral. The definition of a quadrilateral is stated as "the only polygon for which the opposite sides and opposite angles are defined"....[more]

This lesson reviews and describes the properties of all types of quadrilaterals.
It also demonstrates how to compare the properties of different quadrilaterals
with each other. (12:50)

In this five-minute video, Sal Khan focuses on the properties of a quadrilateral. He discusses parallelograms, trapezoids, a rhombus, rectangles, and squares. (05:07)

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