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|Jackiw, Koedinger; Key Curriculum Press|
|Four sketches illustrating various mechanical linkages: a windshield wiper, a sewing machine, elevator doors, and Peaucellier's Linkage.|
|Levels:||High School (9-12), College|
|Resource Types:||Documents/Sketches/Galleries, Geometer's Sketchpad|
|Math Topics:||Conic Sections and Circles, Mechanics of Solids|
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