A polygon has 104 diagonals. How many sides does it have?
Self made
Pick:
A) 12 B) 13 C) 14 D) 15 E) 16
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 = 104   n*(n - 3) = 208   Substitute n from the answer choices. n = 16   Answer: 16
<result>E</result>
A polygon has 104 diagonals. How many sides does it have?
Self made