Dodecagon

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dodecagon

[dō′dek·ə‚gän]
(mathematics)
A 12-sided polygon.

Dodecagon

A 12-sided regular polygon; the angle included between the 12 equal sides is 115 degrees.
References in periodicals archive ?
A dodecagon is then drawn using the mid-points of the square and the points where the triangles meet.
Four equilateral triangles are drawn from the dodecagon to the four vertices of the square.
Copies of the isosceles triangles inside the dodecagon are produced by selecting them and then rotating them first by 30 degrees and then by 60 degrees.
Here we give steps for building the planters from a smoothsided square to dramatically textured dodecagons like the one shown in our cover photograph.
From equilateral triangles to squares, regular hexagons, octagons, dodecagons, parallelograms, regular pentagons, golden rectangles, and more, geometry students will get a hands-on appreciation for the laws that govern these shapes and the opportunity to internalize basic mathematical principles in more than one way.
Students found trapezoids, diamonds, pentagons, hexagons, octagons, nonagons, decagons, dodecagons, and stars without prompts other than "Find other polygons.
The general format used in this activity could easily be extended to an exploration of regular polygons for which students are not likely to have concrete manipulatives, such as heptagons, nonagons, decagons, and dodecagons.
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