Tony Foster's Proof of Viviani's Theorem
What Might This Be About?
23 February, 2017, Created with GeoGebra
Viviani's Theorem
The sum of distances of a point inside an equilateral triangle or on one of its sides equals the length of its altitude.
The theorem is named after Vincenzo Viviani (1622-1703).
Proof
Acknowledgment
The above is a slight modification of Tony Foster's proof of Viviani's theorem.
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