The applet below contains a quadrilateral that ALWAYS remains an [color=#1e84cc][b]ISOSCELES TRAPEZOID[/b][/color]. [br][br]The purpose of this applet is to help you understand many of the geometric properties an [color=#1e84cc][b]ISOSCELES TRAPEZOID[/b][/color] has. [br][br]The questions you need to answer are displayed below this applet.

[color=#cc0000][b]Questions:[/b][/color][br][br]Use your observations from interacting with this applet to investigate the answers to the following questions:[br][br]1) Is an isosceles trapezoid a parallelogram? Why or why not?[br][br]2) Are opposite sides of an isosceles trapezoid congruent? If so, how many pairs?[br][br]3) Are opposite angles of an isosceles trapezoid congruent?[br][br]4) Look at the two pairs of consecutive angles between the parallel bases. What is the sum of the measures of the angles in each pair?[br][br]5) Look at the measures of each pair of base angles ([math]\angle[/math]ADC and [math]\angle[/math]DCB; [math]\angle[/math]DAB and [math]\angle[/math]ABC). What do you notice about these pairs of angles?[br][br]6) Do the diagonals of an isosceles trapezoid bisect EACH OTHER?[br][br]7) Does a diagonal of an isosceles trapezoid bisect a pair of opposite angles?[br][br]8) Are the diagonals of an isosceles trapezoid perpendicular? [br][br]9) Are the diagonals of an isosceles trapezoid congruent?