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parallelogram door

Author:
Arthur Lee
Topic:
Parallelogram
Click this link to see a parallelogram door. https://www.evernote.com/l/AANpFOC6RvBOOIzq2m7KkHz761XwygLIgLk In the following applet, the green door is rectangular. Notice the movement of D when you open the door by dragging D.  Drag B to the right of the vertical white line to make the door a parallelogram. Imagine movement of D again and try opening the door. Can the door be tilted to the left in the real building?
Here is an example of open parallelogram window. https://www.evernote.com/l/AANmPC4awV9Pl44Z03MD5cwgZyb2zYCK3v4

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