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MathNet 2026 — Part 02 Question 131

Math Olympiad Vault · MathNet 2026 — Part 02

Question 131

Triangles with integer sides - How many triangles are there whose sides are integers and the perimeter is $12$?
  1. $1$
  2. $3$
  3. $5$
  4. $7$
  5. $9$