Stone Age Geometry
SpheresBook - 2014
"Leo teaches his cat Pallas all about spheres by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, including radius, circumference, and diameter. Information boxes accompany each story to explore real applications of spheres in the natural and designed world."--
Publisher: St. Catharines, Ontario ; New York : Crabtree Publishing Company, 
Characteristics: pages cm.