|Manipulative 1: Dodecagon. Created with GeoGebra.||
A dodecagon is a
that has 12 sides. A regular dodecagon is a 12 sided
Click on the blue points in manipulative 1 and drag them to change the figure.
Click on the check boxes in manipulative 1 to see properties of a regular dodecagon.
The variable s in the formula in table 1 is the length of one of the sides
of a regular dodecagon.
|Inradius: The radius of the incircle.|
|Circumradius: The radius of the circumcircle.|
|Table 1: Regular Dodecagon Formulas.|