Polygons can be regular or irregular in shape. A polygon is a closed 2D shape with at least three sides. A regular polygon is a polygon with all equal sides and angles. An irregular polygon is a ...

David P. Robbins, a noted mathematician who tried in his dying months to solve a problem that had bothered him since he was a boy -- What is the area of a polygon if you know only the lengths of the ...

Polygons can be regular or irregular. If the angles are all equal and all the sides are equal length it is a regular polygon. To find the sum of interior angles in a polygon divide the polygon into ...