Animated Proof of the Pythagorean Theorem
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http://www.nadn.navy.mil/MathDept/mdm/pyth.html  


Mark D. Meyerson; Mathematics Dept., U.S. Naval Academy  
Starting with a right triangle and squares on each side, the middle size square is cut into congruent quadrilaterals (the cuts through the center and parallel to the sides of the biggest square). Then the quadrilaterals are hinged and rotated and shifted to the big square. Finally the smallest square is translated to cover the remaining middle part of the biggest square. Thus the sum of the squares on the smaller two sides equals the square on the biggest side.  


Levels:  Middle School (68), High School (912) 
Languages:  English 
Resource Types:  Problems/Puzzles 
Math Topics:  Triangles and Other Polygons 
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