#### MathematicalPhysicist

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i know that each n-polygon is characterized by its n sides, and n angles, but i didn't find its cardinality, for example we can divide this set to disjoint sets of: triangles,quandrangulars, etc.

we can characterize the triangles set by each triangle has (x,y,z) which are its sides, and (a,b,c) are its angles, the angles are between 0 and pi, but besides this i dont know how to procceed, from here.

can someone advise?