Using this virtual manipulative, the student can examine the dual relationship among the five platonic solids, each a polyhedron with identical regular polygonal faces. Every platonic solid has a unique platonic solid that fits inside it, with its vertices at the midpoints of the original solid. The student can manipulate, color, and change the size of each solid. A transparent mode is available for viewing the outline of each polyhedron and its dual. Instructions for using the applet and information about platonic solids are included. There is also a link to the NCTM standard for geometry. Copyright 2005 Eisenhower National Clearinghouse


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Visualization,Grade 6,NSDL,Grade 8,Grade 9,Spatial sense,Mathematics,Grade 7,Process skills,Polyhedra,NSDL_SetSpec_1007936,Grade 10,Grade 11,Grade 12,Life Science,Informal Education,Middle School,Geometry,oai:nsdl.org:2200/20120114184450734T,Solid geometry,High School,Education



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