Skip to content / Đến nội dung
ThichHocToan.com

VTMO 2015 — Grade 8 — semifinal Question 17

VTMO · VTMO 2015 — Grade 8 — semifinal

Question 17

Choose three distinct lengths from $1 , 2 , \ldots , 10$ to form a triangle. How many choices?
  1. $45$
  2. $46$
  3. $49$
  4. $50$
  5. $55$