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luisz

Farial inscribed a quadrilateral ABCD in a circle, as shown below. If the measure of arc BCD is 220°, what is the measure of angle BCD?

  • one year ago
  • one year ago

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  1. luisz
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    • one year ago
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  2. luisz
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    yeh!!!

    • one year ago
  3. luisz
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    any tips?

    • one year ago
  4. LoveYou*69
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    I don't know:( I am sorry, I will try to get someone who will know here tho!:D

    • one year ago
  5. luisz
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    ty

    • one year ago
  6. luisz
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    k

    • one year ago
  7. luisz
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    so did you get someone?

    • one year ago
  8. luisz
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    ty

    • one year ago
  9. terenzreignz
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    Are you sure it's the measure of angle BCD you want? you just gave its measure...

    • one year ago
  10. luisz
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    yes, we need the measure of angle BCD...

    • one year ago
  11. luisz
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    I mean arc!!!!!!!!!!!!!!!!

    • one year ago
  12. luisz
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    sorry

    • one year ago
  13. luisz
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    no

    • one year ago
  14. luisz
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    I mean angle

    • one year ago
  15. luisz
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    sorry

    • one year ago
  16. legoauto220
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    |dw:1340465784240:dw| Like this? IS the image correct? And we have to get the angle now, the angle C

    • one year ago
  17. luisz
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    Yes, angle BCD

    • one year ago
  18. THE_PROPHET
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    70

    • one year ago
  19. luisz
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    can you tell me how?

    • one year ago
  20. luisz
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    why is at 70?

    • one year ago
  21. luisz
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    its correct but why?

    • one year ago
  22. legoauto220
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    Because 360-220=140, and the central angle is double the angle in the circumfrence, so its 70

    • one year ago
  23. luisz
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    ty

    • one year ago
  24. luisz
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    I thought the same exact thing

    • one year ago
  25. legoauto220
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    |dw:1340466383693:dw|

    • one year ago
  26. luisz
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    I wasn't sure if it was correct, though.

    • one year ago
  27. luisz
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    ty

    • one year ago
  28. legoauto220
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    np

    • one year ago
  29. THE_PROPHET
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    angle BOD =140 centre is O angle subtended by chord on cente is twice the angle subtended on the circle .....so 2x = 140 x = 70

    • one year ago
  30. luisz
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    let me post another problem...

    • one year ago
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