how many diagonals are there in a polygon having 12 sides? a7 b8 c9d12
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None from the optionsThis answer is correct as same question is in my book
a) Formula for number of diagonals on an n= sided polygon=2n(n−3)
For n=12
Number of diagonals=212×(12−3)
=212×9
=54.
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no of daigonals= n(n-3)/2....
so no of diagonals of a polygon having 12 sides = 54
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