Using this virtual manipulative, the student can examine the five platonic solids, each a polyhedron with identical regular polygonal faces. The ancient Greeks discovered that there were five and only five such solids. The student can manipulate and change the size of each solid. A transparent mode is available for viewing the outline of each polyhedron. It is also possible to investigate the vertices, edges, and faces and apply Euler's formula. Instructions for using the applet, background information about the platonic solids, and a lesson plan are included. There is also a link to the NCTM standard for geometry. Copyright 2005 Eisenhower National Clearinghouse

Summary

Subject keyword(s)	Education, Geometry, Mathematics, Polyhedra, Process skills, Solid geometry, Spatial sense, Visualization
Grade level	Elementary School, Middle School, High School, Informal Education
Intended audience	Learner
Resource type	Instructional Material
Resource format	text, text/html
Rights	Copyright 2003 MATTI Associates LLC. All rights reserved.

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