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Mathematics 15 Online
OpenStudy (anonymous):

im tottaly confused

OpenStudy (anonymous):

OpenStudy (anonymous):

ok look

OpenStudy (anonymous):

you know what a 15 gon is or no

OpenStudy (anonymous):

nope im asuming a polygon that has 15 sides?

OpenStudy (anonymous):

OpenStudy (anonymous):

okay so than what

OpenStudy (anonymous):

oo ok know do you know diagonal lines are

OpenStudy (anonymous):

noped

OpenStudy (anonymous):

i think its 90

OpenStudy (anonymous):

let me see k :)

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

So that's 15*12. However, you're counting each of these diagonals TWICE because they each connect two different points. So the answer is 15*12/2 = 15*6 = 90.

OpenStudy (anonymous):

so ya it 90

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