how many internal diagonals does a heptagon (seven sided polygon) have?  Pick one
A) 7 B) 9 C) 14 D) 20 E) 35
Number of diagonals in any polygon can be found using this formula: n(n-3)/2   Here n = 7   No. of diagonals = 7(7 - 3)/2   = 14   Ans 14
<result>C</result>
how many internal diagonals does a heptagon (seven sided polygon) have?