Polygons are defined in easily understood text and demonstrated with colorful illustrations.  Different cartoon animals identify examples from 3-sided shapes (triangles) to 10-sided shapes (decagons).  Terms are reinforced on pages – the number of animals equal the number of sides on the polygon.  There is a fine arts tie-in with the decagon (10-sided) shape.  A decagon is the frame around a cat resembling the Mona Lisa, two dogs representing Grant Wood’s American Gothic, and a giraffe portraying The Scream by Edvard Munch.  A quick review precedes the page containing the glossary, index, a Facthound internet site, and other books to read about polygons.  Also listed are other books in the Math Fun series.