The applet below contains a quadrilateral that ALWAYS remains a rectangle. [br]The purpose of this applet is to help you understand many of the geometric properties a rectangle has. [br][br]Interact with this applet for a few minutes. As you do, be sure to move [b][color=#1e84cc]points [i]A[/i], [i]B[/i], and [i]D[/i][/color][/b] around! [br][br]After doing so, please complete the questions below.
Display the lengths of all four sides. What, if anything do you notice?
Construct the diagonals and display the lengths. What do you notice> Describe in detail.
Construct [math]\bigtriangleup[/math]ABC, then reflect the triangle about AC. What do you notice?
Construct [math]\bigtriangleup[/math]DBA, then reflect about DB. What do you notice?
Is a rectangle a parallelogram? If so, WHY is it a parallelogram? (Provide at least 3 reasons to defend your answer.