Wolfram Demonstrations Project
8758

Nine-Point Circle

The nine-point circle associated with a given triangle passes through the perpendicular feet (green), the midpoints of the sides (black), and the midpoints (red) of the segments connecting the vertices with the orthocenter H.

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 Chris Boucher
"Nine-Point Circle"
 http://demonstrations.wolfram.com/NinePointCircle/
 Wolfram Demonstrations Project
 Published: June 5, 2007
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