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 ...

Mathematics in School, Vol. 48, No. 2 (MARCH 2019), pp. 23-25 (3 pages) ...

A French mathematician has completed the classification of all convex pentagons, and therefore all convex polygons, that tile the plane. One of the oldest problems in geometry asks which shapes tile ...