Ptolemy's Theorem

Author:
민은기 (Min Eun Gi)
Ptolemy's Theorem http://min7014.iptime.org/origin/수학자료실/Ptolemy's%20Theorem.pdf
GeoGebra Applet
Ptolemy's Theorem http://min7014.iptime.org/origin/수학자료실/Ptolemy's%20Theorem.pdf

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