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VTMO 2013 — Grade 9 — semifinal Question 17

VTMO · VTMO 2013 — Grade 9 — semifinal

Question 17

Two parallel lines contain six and four marked points. How many triangles have vertices among them?

Question illustration
  1. $6$
  2. $15$
  3. $36$
  4. $60$
  5. $96$