A polygon has 230 diagonals. How many sides does it have?
Self made  Choices.
A) 22 B) 23 C) 24 D) 25 E) 26
The best way to solve this problem is to use the formula: An n sided polygon can have n*(n - 3)/2 diagonals   n*(n - 3)/2 = 230   n*(n - 3) = 460   Substitute n from the answer choices. n = 23   Answer: 23
<result>B</result>
A polygon has 230 diagonals. How many sides does it have?
Self made