Math Open Reference
Math Open Reference: Polygons
Get the definition and properties of a polygon. Then explore such topics as: 1) types of polygon 2) area 3) Perimeter 4) angles associated with polygons and 5) names of polygons.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Apothem of a Hexagon
This Q & A forum has a question answered on how to find the apothem of a hexagon.