polyhedra

Relates the story of Leonhard Euler's discovery of the polyhedron formula and its impact on topology, covering how the Greeks and Descartes almost grasped the formula and how mathematicians since the nineteenth century have adapted the formula's scope for various uses.

Models are shown in photographs and along with line drawings, diagrams and commentary, invite readers to make the models.

Text and illustrations explain how to make models of uniform polyhedra and some stellated forms.

Colorful photographs and easy-to-follow text introduce young readers to flexagon paper art.