SOLUTION: if a figure has 14 sides, how many diagonals does it have?

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Question 353213: if a figure has 14 sides, how many diagonals does it have?
Found 2 solutions by edjones, ewatrrr:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
Let n=number of sides.
Number of distinct diagonals=(n(n-3))/2
=(14*11)/2
=154/2
=77
.
Ed

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Hi,
*Note: polygon with n sides:
%28n%28n-3%29%29%2F2 is the formula for the # of diagonals in terms of the number of sides:
.
polygon with 14 Sides:
Number of diagonals is %2814%2A11%29%2F2
.
77 diagonals