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anonymous

  • one year ago

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  1. anonymous
    • one year ago
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    What is the length of the unknown side of the right triangle? A right triangle with hypotenuse x and legs 21 and 20 21 29 400 441

  2. Astrophysics
    • one year ago
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    Use the pythagorean theorem as before

  3. Astrophysics
    • one year ago
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    Now you set it up

  4. anonymous
    • one year ago
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    can i see the formula again?

  5. Astrophysics
    • one year ago
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    \[a^2+b^2=c^2\]

  6. anonymous
    • one year ago
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    so in the Pythagorean Theorem, \[a ^{2}+b ^{2}=c ^{2}\] where the a and b represent the legs of the triangle, and c is the hypotenuse

  7. anonymous
    • one year ago
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    21^2+20^2=

  8. anonymous
    • one year ago
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    correct

  9. Astrophysics
    • one year ago
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    Yes good! so you have \[21^2+20^2 = x^2\]

  10. Astrophysics
    • one year ago
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    Keep going :)

  11. anonymous
    • one year ago
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    ok 21*21 right?

  12. anonymous
    • one year ago
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    yes, do 21*21, and 20*20

  13. anonymous
    • one year ago
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    then add them up

  14. Astrophysics
    • one year ago
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    Yup

  15. anonymous
    • one year ago
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    to get part of your answer

  16. anonymous
    • one year ago
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    kk 441+400=

  17. Astrophysics
    • one year ago
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    Good, keep going

  18. anonymous
    • one year ago
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    then, you must find the square root of that "part of the answer"

  19. anonymous
    • one year ago
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    so find the square root of 841

  20. anonymous
    • one year ago
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    ok 29? XD

  21. Astrophysics
    • one year ago
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    Ok well since you said square root already haha, I will show you why exactly we take the square root, via algebra. |dw:1438607451660:dw| when you take the square root we have a positive and negative answer but you don't need to really worry about that, that's the algebra behind it.

  22. Astrophysics
    • one year ago
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    Yes, 29

  23. anonymous
    • one year ago
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    29 is correct

  24. anonymous
    • one year ago
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    thx

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