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How many polygons can be formed from 5 non-collinear points on a plane?​

Sagot :

Answer:

Take all the five points to form a pentagon. The total number of polygons formed by n points is (n - 1)!/2. (Number of cyclic permutations = (n - 1)!, divided by 2 to not count them twice, once clockwise and once counterclockwise.) For n = 5 this gives 12 pentagons.

Step-by-step explanation:

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