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VTMO 2013 — Grade 7 — semifinal Question 20

VTMO · VTMO 2013 — Grade 7 — semifinal

Question 20

Two parallel lines each contain four marked points. How many triangles have vertices among these points?

Question illustration
  1. $30$
  2. $24$
  3. $36$
  4. $60$
  5. $48$