1) The intersection point C of lines B

2) Take point D on C

3) The ratio r

1) Apply Menelaus to triangle AB

2) Apply Menelaus to triangle AC

3) Apply Menelaus to CB

Actually the curve c (a Bezier spline) is not terribly necessary, but I leave it there since I like its shape.

Desargues.html

Harmonic.html

LineInTrilinears.html

Menelaus.html

MenelausApp.html

MenelausFromCeva.html

Newton.html

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