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emily9102

help please

  • one year ago
  • one year ago

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  1. emily9102
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    • one year ago
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  2. Jusaquikie
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    so here is what we have:|dw:1351376665576:dw|

    • one year ago
  3. Jusaquikie
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    what we want to do is make a triangle out of that and use the Pythagorean theorem (\[A^{2} +B^{2} = C^{2}\])

    • one year ago
  4. emily9102
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    ok, writing as you type :)

    • one year ago
  5. Jusaquikie
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    |dw:1351376894963:dw|

    • one year ago
  6. Jusaquikie
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    so A(5+10) B(4+3) is \[15^{2}+8^{2}= 225+64= \sqrt{289} = 17\]

    • one year ago
  7. Jusaquikie
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    that gives the diameter which is 2r so the radius is 8.5

    • one year ago
  8. Jusaquikie
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    wait it's 7 not 8 lol

    • one year ago
  9. emily9102
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    7.5 or just 7?

    • one year ago
  10. Jusaquikie
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    so that changes it to 225+49 =274

    • one year ago
  11. Jusaquikie
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    the square root of that is 16.55 divided by 2 is 8.276

    • one year ago
  12. emily9102
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    so 8.3?

    • one year ago
  13. Jusaquikie
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    do you see where the numbers come from?

    • one year ago
  14. emily9102
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    yes i was just checking. trying to write fast lol

    • one year ago
  15. Jusaquikie
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    it would have been neater if i didn't use 8 on the clean example lol

    • one year ago
  16. emily9102
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    lol yes lots of scratch now haha. so just to be sure its 8.3?

    • one year ago
  17. Jusaquikie
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    yes that is what it rounds to

    • one year ago
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