(thing) by jesler Sun Jun 24 2001 at 13:12:14
<< Undecagon   -   13-gon? >>

A polygon of twelve sides, having an internal angle sum of 1800 degrees.

For a regular dodecagon with sides of length x,

Area = x211.196
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(definition) by Webster 1913 Tue Dec 21 1999 at 23:11:23

Do*dec"a*gon (?), n. [Gr. twelve + angle: cf. F. dod'ecagone.] Geom.

A figure or polygon bounded by twelve sides and containing twelve angles.

 

© Webster 1913.

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