Special Quadrilateral: Theorem 4

Interact with the applet below for a few minutes. [br]Then, answer the questions that follow. [br][br]Feel free to move the BIG WHITE POINTS anywhere you'd like! [br][color=#38761d]You can also adjust the size of the green angle by using the slider. [/color]
1.
What conditional (if-then) statement can you write based upon the logical order of dynamic phenomena (i.e. actions) you observed in this applet?
2.
Write a 2-column, paragraph, or coordinate-geometry proof of the conditional statement you wrote for (1) above.
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Information: Special Quadrilateral: Theorem 4