how many diagonals does a polygon with 15 sides have , if one of its vertices does not connect to any diagonal ?
if i calculate it using the formulae , # diagonals = n ( n - 3 ) / 2 each vertex sends of n - 3 diagonals n = 15 - 1 then 14 * ( 14 - 3 ) / 2 = 77 correct option : c
divide(multiply(subtract(15, const_1), subtract(subtract(15, const_1), const_3)), const_2)