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Paper Folding

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Visual Index Paper Models of Polyhedra. Pictures of Platonic Solids. A Platonic solid is a polyhedron all of whose faces are congruent regular convex polygons*, and where the same number of faces meet at every vertex.

Pictures of Platonic Solids

The Greeks recognized that there are only five platonic solids. But why is this so? The key observation is that the interior angles of the polygons meeting at a vertex of a polyhedron add to less than 360 degrees. Tetrahedron: Three triangels at a vertex: 3*60 = 180 degrees Octahedron: Four triangles at a vertex: 4*60 = 240 degrees. - cube-small.pdf. - pyramid.pdf. 3D Shapes for Kids. Kids often learn best when they have a hands on experience.

3D Shapes for Kids

These 3D shapes for kids will provide just that. Kids will enjoy cutting them out, folding them, and taping them together. Not only will they be able to see the 3D shapes for all angles, they’ll also gain true understanding which can’t be learned from a 2D image. Artybecca: Hollow Bead Form templates.