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rebecca1233

  • 2 years ago

in a 40 ^0 - 45^0 - 90^0 right triangle, the hyptoenuse is 5m. how long are the legs? please help

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  1. rebecca1233
    • 2 years ago
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    oops first one is 45^0 too

  2. rebecca1233
    • 2 years ago
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    so 45^0 - 45^0 - 90^0

  3. jim_thompson5910
    • 2 years ago
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    Hint: |dw:1358468818520:dw|

  4. baziham
    • 2 years ago
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    |dw:1358468848265:dw|

  5. rebecca1233
    • 2 years ago
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    so what do i do? can u help me get the answer?

  6. jim_thompson5910
    • 2 years ago
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    The figure allows us to say \[\Large x\sqrt{2} = 5\]

  7. jim_thompson5910
    • 2 years ago
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    solve for x to get your answer

  8. rebecca1233
    • 2 years ago
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    so i just 2 *5?

  9. jim_thompson5910
    • 2 years ago
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    no

  10. jim_thompson5910
    • 2 years ago
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    You have to divide both sides by \(\Large \sqrt{2}\), then rationalize the denominator (if the book requires you to do it)

  11. rebecca1233
    • 2 years ago
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    so 5 divide by 2?

  12. jim_thompson5910
    • 2 years ago
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    square root of 2

  13. rebecca1233
    • 2 years ago
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    so 3

  14. jim_thompson5910
    • 2 years ago
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    no, it's not 3

  15. rebecca1233
    • 2 years ago
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    idk i suck at square rooting stuff

  16. jim_thompson5910
    • 2 years ago
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    It's just simply \[\Large x = \frac{5}{\sqrt{2}}\] optionally you can rationalize the denominator to get \[\Large x = \frac{5\sqrt{2}}{2}\]

  17. rebecca1233
    • 2 years ago
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    5 divide square root 2 ?

  18. jim_thompson5910
    • 2 years ago
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    yep

  19. rebecca1233
    • 2 years ago
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    1.41

  20. rebecca1233
    • 2 years ago
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    1.414

  21. jim_thompson5910
    • 2 years ago
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    that's the approximate value of the square root of 2

  22. rebecca1233
    • 2 years ago
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    ok then what cause i gotta find how long the leg is

  23. jim_thompson5910
    • 2 years ago
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    type this into your calculator 5/sqrt(2)

  24. rebecca1233
    • 2 years ago
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    i did thats wat i got

  25. jim_thompson5910
    • 2 years ago
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    you couldn't have gotten 1.414 if you typed in 5/sqrt(2)

  26. rebecca1233
    • 2 years ago
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    well i did .

  27. rebecca1233
    • 2 years ago
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    i got more numbers than that but i just didnt write em all

  28. rebecca1233
    • 2 years ago
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    those were beginning numbers

  29. jim_thompson5910
    • 2 years ago
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    i think you just typed in sqrt(2)

  30. rebecca1233
    • 2 years ago
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    no.. i did the 5 / sqt 2

  31. jim_thompson5910
    • 2 years ago
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    well it should be 3.5355339059

  32. rebecca1233
    • 2 years ago
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    hmm..

  33. jim_thompson5910
    • 2 years ago
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    my thoughts exactly, not sure how you got 1.414

  34. rebecca1233
    • 2 years ago
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    hmm.. so what do i do now ?

  35. jim_thompson5910
    • 2 years ago
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    once you have 3.5355339059, you are done finding the approximate leg length

  36. rebecca1233
    • 2 years ago
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    okay. i got it.. thanks :)

  37. jim_thompson5910
    • 2 years ago
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    yw

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