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2010 AMC 10A Question 22

AMC10 · 2010 AMC 10A

Question 22

Eight points are chosen on a circle, and chords are drawn connecting every pair of points. No three chords intersect in a single point inside the circle. How many triangles with all three vertices in the interior of the circle are created?
  1. $28$
  2. $56$
  3. $70$
  4. $84$
  5. $140$