how many internal diagonals does a octagon (eight sided polygon) have?	Choose the correct answer:
A) 90	B) 85	C) 70	D) 35	E) 20
Number of diagonals in any polygon can be found using this formula: n(n-3)/2   Here n = 8   No. of diagonals = 8(8 - 3)/2   = 20   Ans 20
<result>E</result>
how many internal diagonals does a octagon (eight sided polygon) have?