What is the number of diagonals of a regular polygon with 10 sides?
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1
the number of duagolals in a polygon is n(n-3)/2. so a decagon has 10(10-3)/2 =10*7/2=35 diagonals . for a diagonal to be formed , 2 vertices are required .
thus in a decagon there are 10sides
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8
it has 35 diagonals....
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