Question
Given a regular polygon with n vertices. Calculate the number of distinct (non-congruent) triangles whose vertices coincide with the vertices of the polygon.
Difficulty level (1 very easy - 10 very hard): 6
Topics:
Combinatorics
Number Theory
->
Modular Arithmetic / Remainder Arithmetic
->
Divisibility Rules
Geometry
->
Plane Geometry
->
Angle Calculation
Geometry
->
Plane Geometry
->
Triangles
->
Triangle Congruence
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