If the lengths of two sides of a triangle are 5 and 9, respectively, which of the following could be the length of the third side of the triangle?
a. 3
b. 5
c. 8
d. 15

- anonymous

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- katieb

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- hybrik

You can use the Pythagoras theorem, and else, where is the picture?

- anonymous

no picture...

- hybrik

Okay, then do 5^2 + 9^2 = c^2

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## More answers

- hybrik

(AKA Pythagoras Theorem)

- anonymous

doesn't work..

- Nnesha

sum of two sides must greater than the 3rd one
a+b >c
b+c >a
a+c> b

- carolinar7

c^2=25+81 right?

- anonymous

a+b

- campbell_st

well there is a basic for triangles the sum of the shorter sides must be greater than the longest side...
so if 9 is the longest and x is a short side you can say
5 + x > 9
if x is the longest side then
5 + 9 > x
hope it helps

- Nnesha

a = 1st side
b= 3rd side
c = 3rd sides

- hybrik

You can do the 3rd side has to be bigger then the other sides

- anonymous

got it thanks @Nnesha

- Nnesha

yw

- anonymous

So wait I thought I had it but I don't

- anonymous

it can be all 4 options?

- anonymous

no

- anonymous

only B and C

- anonymous

Why?

- Nnesha

first option
a = 3 b = 5 c = 9
so a +b > c
3+ 5 > 9 is it correct?

- anonymous

it is the reason that @campbell_st mentioned above

- Nnesha

8 is greater than 9 ?

- anonymous

no

- anonymous

hey 15 works too right?

- anonymous

but if you take 15,
5+9 < 15
so it doesnt work

- anonymous

always any of the two sides should be equal or greater than the other

- anonymous

ohhhhhhhh got it

- Nnesha

:O what happened to ur post http://prntscr.com/7wm14b ?

- Nnesha

http://i.imgur.com/ASDEMnt.png and i got mod power :o -.-

- anonymous

lolol cool teehee

- Nnesha

do you see this weird thing http://prntscr.com/7wm23v ?

- Nnesha

nvm link isn't working

- anonymous

yea on the first picture i do

- Nnesha

ohhh weird ..... :/

- anonymous

wow I didn't know you can have level 222 that's like equivalent to super saiyan level on here lmao

- Nnesha

i was trying to delete ur post but eehh that was a dream

- anonymous

lmaoo hey you can't delete me !!!! only i delete me!!!!!

- Nnesha

lo alright gO_Od luck!

- anonymous

i tried to close it but it's not working o.O

- Nnesha

see ..

- Nnesha

ohh closed congrats :D

- anonymous

there u goooo I refreshed the page and it worked

- Nnesha

thats what i did ..

- anonymous

hmmm you know what?.... honestly i really love openstudy but the only thing i hate is that it lags wayyyyyy too much

- Nnesha

ik but yeah it's oka nothing is perfect so ..

- anonymous

yea

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