📰00Read later0Read MoreBrianchon's theoremReddit r/learnmath·u/Spank_Engine·6 months ago#YiWFpeoO#theorem#brianchon#dual#pascal#book+4 more🧰Tag tools✨Add tagHow do I prove Brianchon's theorem by dual reasoning to Pascal's theorem as suggested in the book, What is Mathematics? I wasn't sure what the dual is to making two pairs of lines parallel as was done for Pascal's theorem.… Read more15s