Gaussian Curvature (Geometry and the Imagination)
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http://geom.math.uiuc.edu/docs/education/institute91/handouts/node22.html  


Conway, Doyle, Gilman, Thurston; The Geometry Center  
What is the curvature inside the region on a sphere exterior to a tiny circle? On a polyhedron, what is the curvature inside a region containing a single vertex? two vertices? all but one vertex? all the vertices?  


Levels:  Middle School (68), High School (912), College 
Languages:  English 
Resource Types:  Problems/Puzzles 
Math Topics:  Polyhedra, Elliptic & Spherical Geometry 
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