olymmath

HMMT 2006 C4

  • Combinatorics
  • Answer

A dot is marked at each vertex of a triangle ABCA B C. Then, 2,3 , and 7 more dots are marked on the sides AB,BCA B, B C, and CAC A, respectively. How many triangles have their vertices at these dots?

Dataset text NuminaMath olympiads. Quoted with source.

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