While piloting his spaceship through the skies, Captain Invincible encounters three-dimensional shapes, including cubes, cylinders, and pyramids.

Written by a world expert on the subject, Origametry is the first complete reference on the mathematics of origami. It is an essential reference for researchers of origami mathematics and applications in physics, engineering, and design. Educators, students, and enthusiasts will also enjoy this fascinating account of the mathematics of folding.

Learn to recognize and spell basic shapes, each one illustrated with a sliding foil shape that moves.

In MAT MAN SHAPES (hardcover), The popular Mat Man™ character comes to life in an imaginative tale that takes children to a world of shapes and rhymes. A friendly hero opens students' minds to shapes, rhyming verse, imagination, exploration, and community in the first book of the Mat Man™ reading series.

Three mice make a variety of things out of different shapes as they hide from a scary cat.

No matter how hard she tries, Triangle doesn't roll like the circles, or stack like the squares. She sets off to find friends that look exactly like her. But when she finds other triangles, playtime isn't as fun. She misses shapes that roll and stack; she misses being different. So she starts a new quest.

Circles were smooth and round. Good at rolling, spinning, and pushing. They all turned together to make things go. Squares were sturdy and even. Good at stacking, steadying, and measuring. They all fit together to make things stay. In a world where everybody is a shape and every shape has a specific job, Sam is a square who longs for softer corners, rounder edges, and the ability to roll like a circle. But everyone knows that squares don’t roll, they stack. At least that’s what everyone thinks until the day Sam takes a tumble and discovers something wonderful. He doesn’t have to be what others want or expect him to be. With playful imagery, this story considers identity and nonconformity through the eyes of Sam, a square struggling to find his true place in the world.

It's Rashin's first day of school in America! Everything is a different shape than what she's used to: from the foods on her breakfast plate to the letters in the books! And the kids' families are from all over! The new teacher asks each child to imagine the shape of home on a map. Rashin knows right away what she'll say: Iran looks like a cat! What will the other kids say? What about the country YOUR family is originally from? Is it shaped like an apple? A boot? A torch? Open this book to join Rashin in discovering the true things that shape a place called home.

Triangles, circles, squares. To most of us, these are just simple shapes. But in the imaginations of Lulu and Max, these shapes found in a box take on exciting new meanings. What will you see?