How many diagonals does a polygon with 23 sides have, if one of its vertices does not connect to any diagonal?
Choose the most appropriate option:
A) 201  B) 159  C) 179  D) 189  E) 209

Rationale: "if i calculate it using the formulae , # diagonals = n ( n - 3 ) / 2 each vertex sends of n - 3 diagonals n = 23 - 1 then 22 * ( 22 - 3 ) / 2 = 209 correct option : e"
Answer: E