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Tool: Platonic Solids
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Description: This virtual manipulative allows you to display, rotate, and resize Platonic solids. It also allows you to select vertices, edges, and faces, and show that the number of vertices minus the number of edges plus the number of faces is equal to 2 (Euler's formula).
Technology Type: Java Applet 
Guide: User's Guide (opens a new window)
Author: National Library of Virtual Manipulatives (Utah State University)
Language: English 
Cost: Does not require payment for use

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Lesson Plan: 3-D Visualization Activity: Teacher Notes
Activity: 3-D Visualization Activity: Student Handouts
Tools: Platonic Solids - Duals
Platonic Solids - Slicing
Courses: Pre-Kindergarten Geometry in space
Kindergarten Geometry in space
Math 1 Geometry in space
Math 2 Geometry in space
Math 3 Geometry in space
Math 4 Geometry in space
Math 5 Geometry in space
Math 6 Polyhedra, Perspective (3-D in 2-D)
Math 7 Platonic solids, Euler's formula
Geometry Regular polyhedra, 2D pictures of 3D solids

Comment:Being able to rotate a solid is a huge improvement over staring at a static image in a textbook. This tool makes it easy to count the faces, vertices and edges of a platonic solid.