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|Bill Finzer, Key Curriculum Press|
|Two sketches illustrating a problem posed by Wittgenstein: A stick passes through a sleeve (in which it can smoothly slide). The sleeve is nailed to the wall. As one endpoint of the stick describes a circle, what does the other endpoint describe? One sketch shows the problem, and the other answers the question.|
|Levels:||High School (9-12), College|
|Resource Types:||Documents/Sketches/Galleries, Geometer's Sketchpad|
|Math Topics:||Conic Sections and Circles|
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