Quadrilateral [math]ABCD[/math] has vertices [math]A (–6, 8)[/math], [math]B (2, 2)[/math], [math]C (–1, –2)[/math], and [math]D (–9, 4)[/math]. Using slope, distance, and/or midpoints, classify quadrilateral [math]ABCD[/math] as a rectangle, rhombus, square, trapezoid, isosceles trapezoid, or kite.

[list=1][br][*]Graph the quadrilateral.[br][*]Calculate the slopes of the sides to determine if opposite sides are parallel.[br][*]Examine the slopes of the consecutive sides to determine if they intersect at right angles.[br][*]Calculate the lengths of the sides.[br][*]Summarize your findings.[br][/list][br][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit www.walch.com for more information.