The Angle Defect of a Polyhedron (Geometry and the Imagination)
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Conway, Doyle, Gilman, Thurston; The Geometry Center  
The angle defect at a vertex of a polygon is defined to be 2 pi minus the sum of the angles at the corners of the faces at that vertex. What is the angle sum for a polygon (in the plane) with n sides? Determine the total angle defect for each of the 5 regular polyhedra.  


Levels:  Middle School (68), High School (912) 
Languages:  English 
Resource Types:  Lesson Plans and Activities 
Math Topics:  Polyhedra, Triangles and Other Polygons 
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