100 diagonals
* * * * *
No, it is 0.5*10*(10-3) = 35
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A 10-sided polygon is a decagon.
The name of a 10 sided polygon is Decagon.
A polygon with n sides has n*(n - 3)/2 diagonals. So n = 23 gives 23*20/10 = 230 diagonals
A ten-sided polygon is called a decagon.
The name of a 10 sided polygon is Decagon.