christinaxxx
how do i solve this?? the picture is attached!



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christinaxxx
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dw:1329946786612:dw

School_Island_sad_face
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I can't see the pic... I don't know what it is.... I mean I see it but don't know...

fontez
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what?

School_Island_sad_face
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sorry... I don't know what it is... Thats all I am saying

christinaxxx
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hmm...

christinaxxx
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those 2 letters are the letter "r"

School_Island_sad_face
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:( sorry hope you figure it out!

bahrom7893
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what is the question?

christinaxxx
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i have to solve for "r"

bahrom7893
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ohh that part that's coming out is length 3?

christinaxxx
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yupp

bahrom7893
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just use the pythagorean theorem:
(r+3)^2 = 9^2+r^2

christinaxxx
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thank u!

bahrom7893
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r^2+6r+9=81+r^2

bahrom7893
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subtract r^2 from both sides

bahrom7893
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6r + 9 = 81
6r = 819
6r = 72
r = 12