Question

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

Answer 1

Leg xy is where? Can you draw a picture? What's the height of the triangle?

Answer 2

it doesnt give me one i can try and draw one

Answer 3

\[A={1 \over 2}bh\]

Answer 4

thats what it gives me

Answer 5

XY is on the bottom by the way forgot to add all that

Answer 6

no it is not. all it gives me is the area which is 36cm2

Answer 7

i want to say its 12 but not sure

Answer 8

since 36 is a perfect square.\[ \frac{ 1 }{ 2}(12)(6)=36cm^{2}\]

Answer 9

the base has to be 12

Answer 10

thats what im thinking

Answer 11

it gives me 5 different answers to pick from 6,9,12,18,24

Answer 12

No. \[(0.5)(24)(3)=36\]

Answer 13

so your saying 24 would be the length of leg xy?

Answer 14

@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.

Answer 15

well for this question you need to know either the height or the base

Answer 16

Could be a lot of different numbers.
You're missing information.

Answer 17

i can take a picture of the diagram on my cell and upload it for you guys to see the diagram given to me

Answer 18

\[\frac{ 1 }{ 2}bh=36cm ^{2}\]

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

Answer 19

give me a few i will upload a photo with everything given to me

Answer 20

that is what they have given me to work with

Answer 21

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

Answer 22

phoenixfire, you got the other way around :) XY is twice as long as YZ :)

Answer 23

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.

Answer 24

so the length of leg xy is 24?

Answer 25

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

Answer 26

there :)

Answer 27

My bad for that mistake. haha, Thanks @tamtoan

Answer 28

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

Answer 29

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 :)

Answer 30

thank you both for helping me. i did become fans and i think gave a medal? but thanks alot!!!

Answer 31

np :) Good Luck

Answer 32

thank you