Exploration: Properties of an Isosceles Trapezoid

Use the applet to discover the properties of the isosceles trapezoid. By dragging any of the points, you may change the lengths of the nonparallel sides, BC and ED, so that they become congruent. Check the remaining boxes one at a time in order to answer each question. Observe the side lengths, angle measurements, and diagonals of the isosceles trapezoid. Then, write your answers in Task 2.

Number your answers from 1 to 6 that will correspond to every given question.