This teaches you the concepts and problem-solving skills you need to master geometry and build math confidence. Polyhedral (many-sided) characters such as Dodeca, Hexa and Icosa are your guides on this fun-filled exploration of Planet Geometry. You'll learn about attributes of shapes and solids, constructions and transformations, 2D and 3D coordinates, the relationships between length, perimeter, area and volume and much more. Hundreds of problems encourage you to learn and use concepts that provide a solid foundation for success in geometry, and for lasting learning.