Quadrilateral Properties
Quadrilateral Properties Directions:
Default Functions:
Refresh Button:  To reset the applet, click the Refresh Button at the top-right corner.
Zoom In/Out:  Using your scroll wheel, you can zoom in and zoom out of the applets visible area.  The screen tends to re-center wherever the mouse cursor is located.
Move:  Hold the Shift key and then click and hold your primary mouse button to pan around the visible area of the applet.
Movable Objects:
Checkboxes:  Turn on one object at a time.
Movable Points:
A, B, D, E, F, G, J, K, L, M, N, O, P