[color=#cc0000][b]Students: [/b][/color][br][br]The applet below contains a quadrilateral that [color=#1e84cc][b]ALWAYS remains a RECTANGLE.[/b][/color][br]Be sure to move the BIG WHITE VERTICES of this rectangle around.[br][br]Find some "rules" for rectangles. What does a rectangle have to have? What can it not do? Are there any other shapes you can make that you recognize that could be called a rectangle?[br]