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anonymous
 3 years ago
Find the number of sides of each of the two polygons if the total numbers of sides of the polygon is 15, and the sum of the number of diagonals is 36.
anonymous
 3 years ago
Find the number of sides of each of the two polygons if the total numbers of sides of the polygon is 15, and the sum of the number of diagonals is 36.

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0the number of sides is 30

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0i was able to get the number of sides but i don't know how to show the solution

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0the number of side is 9 and 6 i just need a solution how to get this

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0then the numbers of sides of the polygon should be polygons

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1384944170133:dw

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1http://www.dummies.com/howto/content/howtofindthenumberofdiagonalsinapolygon.html

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1So the number of diagonals of a polygon with \(n\) sides is \(\dfrac{n(n3)}2\)

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1Why don't you set up equations :)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0number of diagonals i already given. i need a solution.

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1You could try letting the numbers of sides of the two polygons be \(m\) and \(n\) respectively :)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0can you pls show me the solution. i got this m(m3)/2 + n(n3)/2 = 36

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1Ok I'll set up the equations for you but you'll work out the steps yourself :) \[m+n=15\]\[\frac{m(m+3)}2+\frac{n(n+3)}2=36\]

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1ok here's a hint: \(m=15n\)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0m^23m+n^23n = 72 m^2+n^23(m+n) = 72 we know that m+n = 15 m^2+n^23(15) = 72 m^2+n^2 = 27 after that i dont know

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0substitute 15n for m

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1substitute \(m=15n\) to \(\dfrac{m(m3)}2+\dfrac{n(n3)}2=36\) :)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[\left( 15n ^{} \right)^{2}3\left( 15n \right)+n ^{2}3n=72\]

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1yep, and this will be a quadratic :)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0i got 108 = 27n+n^2

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1Have you learnt quadratic? :)

kc_kennylau
 3 years ago
Best ResponseYou've already chosen the best response.1Use quadratics pl0x

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0can you just pls provide me the whole solution im stuck. sorry if im stupid about this..

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0i stop studying for 5years and i need to recall everything about geometry

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0you did it right you just got 27 instead of 30

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0how did you get the 30?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0from the first equation 22530n+n^245+3n+n^23n=72

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0after that. what is next?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0(15n)^2 gave me the thirty

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0how do i get the n now?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0then you factor the 2n^230n+108 you can divide both sides by two to make it easier n^215n+54

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0two factors of 54 that total to 15

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0yes so those are your sides

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0thank you so much for your patience with me. i really appreciate it.
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