You Need a Sphere to Study Spherical Geometry Imagine learning plane geometry without a flat surface to draw on. It's just as hard to learn spherical geometry without drawing on a sphere. Over 40 activity masters introduce objectives, describe construction steps, guide student investigations, and offer suggestions for additional exploration. The activities review a traditional topic from planar geometry, then give the students directions to experiment with the same topic on the sphere. Students are challenged to shift their thinking from the plane to the sphere and to compare two different worlds of geometry.
Later investigations explore tessellations on the sphere and inscribed Platonic solids.
Teacher's notes provide advice and support for these activities. Students also follow routes taken by explorers and demonstrate the collision of the continental plates. You don't need any previous experience with spherical geometry to use this book. Each Basic Set is packed in its own storage box. Box contains 16 hemispherical transparencies and four hangers.