anonymous
  • anonymous
If the area of the triangle is 36cm2, what is the length, in cm, of leg xy. i missed class and i cant figure it out
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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PhoenixFire
  • PhoenixFire
Leg xy is where? Can you draw a picture? What's the height of the triangle?
anonymous
  • anonymous
it doesnt give me one i can try and draw one
PhoenixFire
  • PhoenixFire
\[A={1 \over 2}bh\] |dw:1354695650945:dw|

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anonymous
  • anonymous
|dw:1354695794159:dw|
anonymous
  • anonymous
thats what it gives me
anonymous
  • anonymous
XY is on the bottom by the way forgot to add all that
PhoenixFire
  • PhoenixFire
|dw:1354695885781:dw|
anonymous
  • anonymous
no it is not. all it gives me is the area which is 36cm2
anonymous
  • anonymous
i want to say its 12 but not sure
anonymous
  • anonymous
since 36 is a perfect square.\[ \frac{ 1 }{ 2}(12)(6)=36cm^{2}\]
anonymous
  • anonymous
the base has to be 12
anonymous
  • anonymous
thats what im thinking
anonymous
  • anonymous
it gives me 5 different answers to pick from 6,9,12,18,24
PhoenixFire
  • PhoenixFire
No. \[(0.5)(24)(3)=36\]
anonymous
  • anonymous
so your saying 24 would be the length of leg xy?
tamtoan
  • tamtoan
@winterfez, that's incorrect, since 72 = 36x2 = 9x8= 18x4 and so on.. , many possibilities , i think phoenixfire leads him on the right track, need more info on this to solve.
anonymous
  • anonymous
well for this question you need to know either the height or the base
PhoenixFire
  • PhoenixFire
Could be a lot of different numbers. You're missing information.
anonymous
  • anonymous
i can take a picture of the diagram on my cell and upload it for you guys to see the diagram given to me
anonymous
  • anonymous
\[\frac{ 1 }{ 2}bh=36cm ^{2}\] I don't think you can find from this equation. Like PhoenixFire point out you need to know 1 more information for either base or height
anonymous
  • anonymous
give me a few i will upload a photo with everything given to me
anonymous
  • anonymous
anonymous
  • anonymous
that is what they have given me to work with
PhoenixFire
  • PhoenixFire
Leg XY is twice as long as YZ. That's the info we needed. Let b=XY and h=2b \[A={1 \over 2}2b^2=b^2\]\[\sqrt{36}=b=6\] Your leg XY=6 and YZ=12
tamtoan
  • tamtoan
phoenixfire, you got the other way around :) XY is twice as long as YZ :)
anonymous
  • anonymous
sorry bout that. my bad. this is my first time using this site. i thought i mentioned it. but thank you very much PhoenixFire, tamotan, and winterfez.
anonymous
  • anonymous
so the length of leg xy is 24?
PhoenixFire
  • PhoenixFire
I see. b=2h h=YZ \[A={1 \over 2}2h^2=h^2\]\[h=\sqrt{36}=6\] \[b=2h=2(6)=12\] XY = 12
tamtoan
  • tamtoan
there :)
PhoenixFire
  • PhoenixFire
My bad for that mistake. haha, Thanks @tamtoan
anonymous
  • anonymous
alright so its 12 like i thought lol:) i was confused. normally im good at math. but missing class and then getting this confused me
tamtoan
  • tamtoan
np phoenixfire :) i made mistakes all the time :) sometimes it's too easy that we are careless, anyway, good night all, bed time for me :)
anonymous
  • anonymous
thank you both for helping me. i did become fans and i think gave a medal? but thanks alot!!!
PhoenixFire
  • PhoenixFire
np :) Good Luck
anonymous
  • anonymous
thank you

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