Dodecagon
A dodecagon is a 12-sided polygon. The sum of its internal angles is .
A regular dodecagon can be seen below:
The area of a regular dodecagon can be calculated by the formula
, where
is the circumradius of the dodecagon. In this case,
would be
. Also, each small triangle (
,
, etc.) is congruent, so
(etc)
.
See Also
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