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![[parent]](http://images.planetmath.org:8080/images/uparrow.png) Viewing Message
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| Maybe the word "Ptolemy" could go in the keywords; the search
engine currently finds no hits on that word.
We might mention some of the easy corollaries of Pt's thm. E.g.
if we specialize to the case in which $AC$ and
$BD$ are diameters of the given circle, we get Pythagoras's theorem.
LH |
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