The applet below contains a quadrilateral that[color=#0000ff][u][b] ALWAYS[/b][/u][/color] remains a parallelogram. The purpose of this applet is to help you understand many of the geometric properties a parallelogram has. Some of these properties are unique and only hold true for a parallelogram (and not just any quadrilateral). The questions you need to answer are displayed below this applet.
1) Are opposite sides of a parallelogram congruent?[br]
2) Are opposite angles of a parallelogram congruent?[br][br]
3) Do the diagonals of a parallelogram bisect each other?[br][br]
4) Does a diagonal of a parallelogram bisect a pair of opposite angles? If so, how many do?[br][br]
5) Are the diagonals of a parallelogram perpendicular?[br][br]
6) Are the diagonals of a parallelogram congruent? Hmmmm?[br][br]
8) Can you make a paralleogram who's diagonals are congruent?[br][br]
9) Does either diagonal of a parallelogram serve as a line of symmetry? If so, how many?[br][br][br]
10) Is a [b]parallelogram a rectangle or is a rectangle a parallelogram[/b]?? [br][br]
11.) Can you manipulate the vertices to get close to making a rectangle? A square? How do you know?