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Mathematics 7 Online
OpenStudy (tylermckinney16):

Help me please give medals and fan :)

OpenStudy (tylermckinney16):

Question is here.

OpenStudy (anonymous):

Do you know the Pythagorean theorem?

rishavraj (rishavraj):

@TylerMckinney16 http://prntscr.com/aar0zz

OpenStudy (tylermckinney16):

Yes i knoow the theorem

OpenStudy (anonymous):

hi

rishavraj (rishavraj):

@TylerMckinney16 first of all get the value of 'y' and then find x http://prntscr.com/aarjbp

OpenStudy (tylermckinney16):

Can u help me please

OpenStudy (welshfella):

Call the diagonal line y y^2 = 6^2 + 8^2 ( by Pythagoras theorem) Now look at the other triangle Y^2 = 12^2 + x^2 ( by pythagoras again) Plug the value of y^2 you found iinto the above equation and solve for x^2 x will be the square rootof x^2

OpenStudy (tylermckinney16):

ok im working on it.

OpenStudy (tylermckinney16):

@welshfella i dont understand what to do lol.

OpenStudy (tylermckinney16):

@SolomonZelman

OpenStudy (welshfella):

can you work out 6^2 + 8^2?

OpenStudy (tylermckinney16):

yeah its 100 right?

OpenStudy (welshfella):

right - so thats the value of y^2 so 12^2 = x^2 + y^2 substituting for y^2 we gat 144 = x^2 + 100 now you need to solve this for x^2

OpenStudy (welshfella):

all you have to do now is subtract 100 from both sides of the equation and you'll get the value of x^2

OpenStudy (tylermckinney16):

is it 44?

OpenStudy (tylermckinney16):

@welshfella

OpenStudy (welshfella):

yes so x = squre root of 44 you can get this on ur calculator.

OpenStudy (welshfella):

that will be 6 point something

OpenStudy (tylermckinney16):

so 44 is the answer?

OpenStudy (tylermckinney16):

@welshfella

OpenStudy (welshfella):

No 44 is not the answer They want you to find value of x the answer is the square root of 44 which you can find using your calculator

OpenStudy (welshfella):

your PC's calculator will do it

OpenStudy (welshfella):

gotta go right now..

OpenStudy (tylermckinney16):

6.63324958071 this right?

OpenStudy (welshfella):

yes write it as 6.63 willl be OK

OpenStudy (tylermckinney16):

k thanks and bye for now ;D

OpenStudy (anonymous):

hello

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