http://demonstrations.wolfram.com/SumOfExteriorAnglesOfAPolygon/
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
You can move the vertices to create a polygon and add vertices by alt + clicking. When you move the "align" slider all the way to the right, exterior angles of the polygon are aligned on a unique point and forms a full angle, 2Pi.
Contributed by: Okay Arik
:O omg this helped sooo much I get it now :L
Linky850 1 year ago