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Mathematics 9 Online
OpenStudy (lollola):

Find the missing length

OpenStudy (lollola):

|dw:1457720187437:dw|

ILovePuppiesLol (ilovepuppieslol):

we use the pythagorean theorem

ILovePuppiesLol (ilovepuppieslol):

\[A^2 + B^2= C^2\]

ILovePuppiesLol (ilovepuppieslol):

a and b are the 2 side lengths and c is the diagonal one that is the hypotenuse

ILovePuppiesLol (ilovepuppieslol):

so for this instance we plug in the numbers

ILovePuppiesLol (ilovepuppieslol):

\[A^2+9^2=14^2\]

ILovePuppiesLol (ilovepuppieslol):

now we don't know A because it is the x value that we are trying to figure out

ILovePuppiesLol (ilovepuppieslol):

we know 9 squared its 81, and 14 squared is 196 through the use of a calculator, now we plug those in

ILovePuppiesLol (ilovepuppieslol):

\[A^2+81=196\]

ILovePuppiesLol (ilovepuppieslol):

now we subtract 81 from both sides to isolate the variable ;) so it becomes

OpenStudy (lollola):

So now its just 196-81=A?

ILovePuppiesLol (ilovepuppieslol):

\[A^2=115\]

OpenStudy (lollola):

Ohhhh

ILovePuppiesLol (ilovepuppieslol):

no because A has to be squared

ILovePuppiesLol (ilovepuppieslol):

so can u find the square root of 115?

OpenStudy (lollola):

10.72

ILovePuppiesLol (ilovepuppieslol):

yeah u can do that or round to the nearest whole

ILovePuppiesLol (ilovepuppieslol):

or tenth or whatever but thats how we get the answer

ILovePuppiesLol (ilovepuppieslol):

does that make sense?

OpenStudy (lollola):

Yes

OpenStudy (lollola):

Thanks

ILovePuppiesLol (ilovepuppieslol):

ok! Glad i could help ^_^

OpenStudy (anonymous):

Il say is 9

OpenStudy (anonymous):

lol

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