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Desargues' Theorem
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Let A1B1C1A_1B_1C_1A1B1C1 and A2B2C2A_2B_2C_2A2B2C2 be two triangles. Then points P=A1B1∩A2B2P=A_1B_1\cap A_2B_2P=A1B1∩A2B2, Q=A1C1∩A2C2Q=A_1C_1\cap A_2C_2Q=A1C1∩A2…
By Navi Nahc
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