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mckenzieandjesus

  • one year ago

is tangent to circle O at B. What is the length of the radius r? Round to the nearest tenth. 15.4 6.1 1.7 2.9

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  1. mckenzieandjesus
    • one year ago
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  2. mckenzieandjesus
    • one year ago
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    @jim_thompson5910

  3. mckenzieandjesus
    • one year ago
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    @Hero

  4. Hero
    • one year ago
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    @mckenzieandjesus, What kind of triangle is ABO?

  5. mckenzieandjesus
    • one year ago
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    acute?

  6. mckenzieandjesus
    • one year ago
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    wait a right?

  7. Hero
    • one year ago
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    If segment AB is tangent to circle O at point B, what does that say about segments AB and OB? Yes, it is a right triangle. Which means what?

  8. mckenzieandjesus
    • one year ago
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    its 90 degrees

  9. mckenzieandjesus
    • one year ago
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    AB and OB are equal?

  10. Hero
    • one year ago
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    Well, you're given two sides of the right triangle and need to find the length of the third side. What rule do we use for this situation?

  11. mckenzieandjesus
    • one year ago
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    Pythagorean theorem?

  12. mckenzieandjesus
    • one year ago
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    a2 + b2 = c2?

  13. Hero
    • one year ago
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    Exactly. \(a^2 + b^2 = c^2\)

  14. mckenzieandjesus
    • one year ago
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    \[10 ^{2}+11.7 ^{2} = 236 \frac{ 89 }{ 100 }\]

  15. mckenzieandjesus
    • one year ago
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    236 89/100^2 = 56116.8721

  16. Hero
    • one year ago
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    Actually, you have to find the correct "a", "b" and "c" when using the pythagorean theorem.

  17. mckenzieandjesus
    • one year ago
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    how do i do that?

  18. Hero
    • one year ago
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    "a" and "b" are always the "legs" of the right triangle. "c" is always the hypotenuse. Sometimes, they give you "a" and "c", but not "b".

  19. mckenzieandjesus
    • one year ago
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    10+1.7= 11 7/10

  20. mckenzieandjesus
    • one year ago
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    can u help with this one? Point P is the center of two concentric circles. PQ = 10.5 and PS = 20.9. RS is tangent to the smaller circle and a chord of the larger circle. What is length of RS to the nearest tenth? 36.1 41.4 31.4 41.8

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  21. Hero
    • one year ago
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    Your work for the problem you originally posted is not correct.

  22. mckenzieandjesus
    • one year ago
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    this one?

  23. Hero
    • one year ago
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    ya, this one.

  24. mckenzieandjesus
    • one year ago
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    i did it wrong? how?

  25. mckenzieandjesus
    • one year ago
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    10^2+1.7^2= 102 89/100?

  26. mckenzieandjesus
    • one year ago
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    @Hero

  27. Hero
    • one year ago
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    I thought you already learned about right triangles. I'm going to say it again. Sometimes, you're given "c" instead of "b", which means, if you have something like a = 3 c = 5 then you have to solve for b: a^2 + b^2 = c^2 3^2 + b^2 = 5^2 b^2 = 5^2 - 3^2 b^2 = 25 - 9 b^2 = 16 b = 4

  28. mckenzieandjesus
    • one year ago
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    i got 132.89 how do i make it smaller?

  29. mckenzieandjesus
    • one year ago
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    11.5?

  30. mckenzieandjesus
    • one year ago
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    10^2+11.5^2= 232 1/4

  31. mckenzieandjesus
    • one year ago
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    232.25

  32. mckenzieandjesus
    • one year ago
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    still lost.. @Hero

  33. mckenzieandjesus
    • one year ago
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    @pooja195

  34. Hero
    • one year ago
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    Yes, I can tell. I think I know something that might be useful for you. Try ixl.com

  35. mckenzieandjesus
    • one year ago
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    ok..

  36. mckenzieandjesus
    • one year ago
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    @jim_thompson5910

  37. mckenzieandjesus
    • one year ago
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    i did it in the steps u showed me @Hero

  38. Hero
    • one year ago
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    In this case, a = r b = 10 c = 11.7 So \(a^2 + b^2 = c^2\) becomes: \(r^2 + 10^2 = 11.7^2\) You subtract 10^2 from both sides: \(r^2 = 11.7^2 - 10^2\) Then square root both sides to get \(r = \sqrt{11.7^2 - 10^2} \)

  39. Hero
    • one year ago
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    You'll have to finish simplifying \(r\) on your own. I'm not going to do that for you. Just let me know what you get. I'll say whether or not it's right or wrong.

  40. mckenzieandjesus
    • one year ago
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    square root 11.7^2-10^2 = 6.073713856?

  41. mckenzieandjesus
    • one year ago
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    6.1?

  42. Hero
    • one year ago
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    Correct.

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