How to Cite "Extension to the Pythagorean Theorem" from CliffsNotes.com:
CliffsNotes.com. Extension to the Pythagorean Theorem. 16 Jul 2013
<http://www.cliffsnotes.com/math/geometry/right-triangles/extension-to-the-pythagorean-theorem>.
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Extension to the Pythagorean Theorem