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anonymous

  • 5 years ago

I need Geometry help with circles and tangents and intersecting lines. http://i79.photobucket.com/albums/j123/MistyBlue2010/05-24-2011031019PM.jpg

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  1. Owlfred
    • 5 years ago
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    Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

  2. anonymous
    • 5 years ago
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    What do you need help understanding?

  3. anonymous
    • 5 years ago
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    For question 6 I don't understand how to find the perimeter

  4. anonymous
    • 5 years ago
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    Where do you need help on this topic?

  5. anonymous
    • 5 years ago
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    I am actually going to need help with all of the questions but maybe it will start to make more sense as we go

  6. dumbcow
    • 5 years ago
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    perimeter is sum of the sides when 2 lines coming from point outside circle both are tangent to circle, then 2 lines are of equal length ex: 2 lines coming from A are both length 2 2 lines coming from B both length 5 2 lines coming from C are both 3

  7. anonymous
    • 5 years ago
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    oooh I thought that whole side was 5

  8. dumbcow
    • 5 years ago
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    yeah they could have labeled it better

  9. anonymous
    • 5 years ago
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    Question 6, I believe the perimeter to be 20. Here is how... The measurements given are from the tangent to the vertex of the triangle Two tangents from a point outside of the circle are equal. Therefore AB = 7 AC = 5 and BC = 8 Now just add

  10. anonymous
    • 5 years ago
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    Okay so for question 7 do I use

  11. anonymous
    • 5 years ago
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    a2+b2=c2?

  12. dumbcow
    • 5 years ago
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    gian better explanation than mine :)

  13. anonymous
    • 5 years ago
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    Use Pythagoras

  14. anonymous
    • 5 years ago
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    9 is 90 degrees right?

  15. anonymous
    • 5 years ago
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    OK here's how... Call radius r So root 28 squared minus root 5 squared is equal to r squared. Therefore 28 - 25 = 3 = r squared. taking square roots r = root 3

  16. anonymous
    • 5 years ago
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    thanks :) that is what I got

  17. anonymous
    • 5 years ago
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    No problem

  18. dumbcow
    • 5 years ago
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    yes 9 is 90 degrees

  19. anonymous
    • 5 years ago
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    I am stuck on number 10 though...

  20. anonymous
    • 5 years ago
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    OH never mind I read the question wrong

  21. anonymous
    • 5 years ago
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    ED is half of CD

  22. anonymous
    • 5 years ago
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    For question 12 how would I find x? Do I assume that x is half of 9?

  23. anonymous
    • 5 years ago
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    Also for question 13 how would I find y?

  24. anonymous
    • 5 years ago
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    You do not have to assume, those line hatches on the chord tell you it is broken in two halves.

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spraguer (Moderator)
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