Asked by marko

find the number of diagonals in a 14 sides polygon
can you help me wiht this?
Answered by marko
i got 14
is that right?
Answered by Rezu
The formula for finding the amount of diagonals in a polygon is n(n-3)/2.
So 14(14-3)/2 = 77 Diagonals

Or Im not sure if this is it

So for n=8, we have 8*5/2=20.

I think it's 77 but Im not sure.
Answered by Ms. Sue
Nope.

Study this site carefully.

http://www.mathopenref.com/polygondiagonal.html
Answered by Rezu
I thought he was talking about a 14 sided polygon so it would have 77. When you go on that website you just gave and make the polygon have 14 sides it says 77. But Im not sure. :/
Answered by Ms. Sue
I think you're right, Rezu.

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