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anonymous

  • one year ago

Picture in comments Please help!!! Triangle ABC is circumscribed about circle O. Find the perimeter of the triangle ABC. A. 50 units B. 45 units C. 40 units D. 21 units

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    Use pythag to find the hypotnenuse as in the drawing|dw:1436368997582:dw|

  3. anonymous
    • one year ago
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    so \[10^{2}+11^{2}=c ^{2}\]

  4. anonymous
    • one year ago
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    Wait, I just saw that 4 down there so... \[15^{2}+14^{2}=c ^{2}\]

  5. anonymous
    • one year ago
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    @nananea1998 do you know how to do that?

  6. anonymous
    • one year ago
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    that would mean 29^2 right? cuz 15+14=29 and its squared

  7. anonymous
    • one year ago
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    @ANA789

  8. anonymous
    • one year ago
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    \[225+196=c ^{2}\] \[\sqrt{c}=\sqrt{429}\] \[c=20.51\]

  9. anonymous
    • one year ago
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    15^2 is 225 and 14^2 is 196 so you add those two together and take the square root when you find the sum

  10. anonymous
    • one year ago
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    Do you see what I did and how I got there?

  11. anonymous
    • one year ago
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    @ANA789 Yes

  12. anonymous
    • one year ago
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    Okay so do you have answer choices?

  13. anonymous
    • one year ago
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    A. 50 units B. 45 units C. 40 units D. 21 units So it'd be D. 21 because it rounds it up?

  14. anonymous
    • one year ago
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    @ANA789

  15. anonymous
    • one year ago
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    Does the question say to round it up or does it want an exact value?

  16. anonymous
    • one year ago
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    @ANA789 It doesn't say to round it up but I don't have an answer choice that has a decimal at all

  17. anonymous
    • one year ago
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    Your answer is going to be 50 units because when you round up 20.51, it goes to 21, therefore 21+14+15=50 units

  18. anonymous
    • one year ago
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    @ANA789 Oh okay ^^ Thank you!!

  19. anonymous
    • one year ago
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    Anytime @nananea1998 :)

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