A regular polygon of n sides has 170 diagonals, then n is equal to

Step-by-step solution

We know that, array rlrl Number of diagonals & = n(n-3) 2 & & 170 & = n(n-3) 2 & 340 & =n(n-3) & 20 17 & =n(n-3) & n & =20 array