This is my 20-page paper on five new theorems of the orthocentric tetrahedron … · @snowboat84 · TwKit

@snowboat84

This is my 20-page paper on five new theorems of the orthocentric tetrahedron with proofs. I named the five theorems as (1) The Thirteen-Point Sphere, (2) The Euler-Line Conjugate Plane, (3) Conjugate Collinearity on the Second Euler Line, (4) Seven Concurrent Lines, (5) A Collinearity Through the Fermat Point. The last one looks the simplest based on its description, but its proof is the most difficult. Paper link: https://zenodo.org/records/23579462

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