Revision history of "1990 APMO Problems/Problem 1"

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  • (cur | prev) 16:24, 19 May 2024Multpi12 (talk | contribs). . (1,019 bytes) (+1,019). . (Created page with "Let .I be the intersection of" AG and EF. Let 6 = AI.IG - FI.IE. Then AI:ADlz, IG:ADl6, FI:BCl4:IE. (1) Fur"ther, applying the cosine rule to triangles ABD, ACD we get i AB2 :...")