Other Definitions
dodecagon (dict)
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DodecagonA dodecagon is a polygon with exactly twelve sides. When spelled uppercase, the outlines of the letters E and H (and I in a serif font) are all dodecagons. A regular dodecagon is a dodecagon with all sides having equal length and all interior angles having the same size of 150 degrees. The area of a regular decagon is given by -
Dodecagon construction A regular dodecagon is constructible with straightedge and compass. The following is a 23 step animation illustrating one way it can be done. Notice that the compass radius is unaltered during steps 8 through 11. See also External links
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