Parallelogram Angle Theorems
Interact with the applet below for a few minutes.
Then, answer the questions that follow.
Feel free to move the BIG WHITE POINTS anywhere you'd like!
You can also adjust the size of the pink angle by using the slider.
1.
What special type of quadrilateral was formed in the first half of sliding the slider? How do you know this?
2.
What else can you conclude about this special type of quadrilateral? Be specific!
3.
In the special quadrilateral above, suppose the pink angle measures 110 degrees. What would the measure of the blue angle be? What would the measure of each interior angle of this special quadrilateral be?