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MathNet 2026 — Part 01 Question 188

Math Olympiad Vault · MathNet 2026 — Part 01

Question 188

The following figure shows a regular dodecagon. Question illustration Answer the following questions:
a) How many equilateral triangles can be formed so that their three vertices are vertices of the dodecagon?
b) How many scalene triangles can be formed so that their three vertices are vertices of the dodecagon?