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anonymous

  • one year ago

Find the length of the unknown side. Round your answer to the nearest tenth. Image of a right triangle with a leg of 4, hypotenuse of 18, and second leg unknown. 16.5 17.5 18.5 22.0

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  1. anonymous
    • one year ago
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    @legendarysadist

  2. anonymous
    • one year ago
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    Just use Pythagorean theorem. \[\large 18^{2}~-~4^{2}~=~x^{2}\]

  3. anonymous
    • one year ago
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    so do I subtract 18-4

  4. anonymous
    • one year ago
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    See those squares? 18 squares minus 4 squared.

  5. anonymous
    • one year ago
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    2.242640687119285

  6. anonymous
    • one year ago
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    \[\large 18^{2}~=~18 \times 18\\\large 4^{2}~=~4 \times 4\]

  7. anonymous
    • one year ago
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    so do I multiply 324x6?

  8. anonymous
    • one year ago
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    \[\large (18 \times 18)~-~(4 \times 4)~=~x^{2}\\\large 324~-~16~=~x^{2}\\\large 308~=~x^{2}\\\large \sqrt{308}~=~x\]

  9. anonymous
    • one year ago
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    17.549

  10. anonymous
    • one year ago
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    And that would be it.

  11. anonymous
    • one year ago
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    17.5

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