It is a dodecagon which has 12 sides
Check: 0.5*(144-36) = 54 diagonals
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A twelve sided polygon.
There is no such polygon that has 95 diagonals because a 15 sided polygon has 90 diagonals and a 16 sided polygon has 104 diagonals.
It is: 0.5*(144-36) = 54 diagonals
54 Diagonals. * * * * * A polygon with n sides has 1/2*n*(n-3) diagonals. So a decagon would have 1/2*10*7 = 35 diagonals. How the Community answer got 54 is anybody's guess!
That polygon is called a "triangle". It has no diagonals.