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anonymous

  • one year ago

3.) Find the value of x for mAB =27°and mCD =49°. The figure is not drawn to scale. http://assets.openstudy.com/updates/attachments/501a0e4be4b02742c0b19d01-jkbo-1343884954655-mc00331.jpg my answer: 51.5 degrees. Is that correct? 4.) Find angle D for angle B = 65 degrees. The figure below is not drawn to scale. http://assets.openstudy.com/updates/attachments/51afce19e4b05b167ed287de-wimsicle-1370476078903-mc0043.jpg My answer: 50 degrees. Is that correct?

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  1. anonymous
    • one year ago
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    @mathstudent55

  2. anonymous
    • one year ago
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    @phi

  3. mathstudent55
    • one year ago
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    3. x = 1/2( m(AB) + m(CD) )

  4. phi
    • one year ago
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    when "inside" the circle, the angle is the average of the two arcs

  5. phi
    • one year ago
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    Q3 is wrong Q4 is correct

  6. anonymous
    • one year ago
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    shoot. is it 76 degrees?

  7. phi
    • one year ago
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    you want the average of 27 and 49

  8. mathstudent55
    • one year ago
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    1/2(27 + 49) for problem 3.

  9. anonymous
    • one year ago
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    22 degrees

  10. mathstudent55
    • one year ago
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    Problem 4. |dw:1438713739527:dw|

  11. mathstudent55
    • one year ago
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    (27 + 49)/2 = 76/2 = 38

  12. anonymous
    • one year ago
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    Thank you for the corrections.

  13. mathstudent55
    • one year ago
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    |dw:1438713844871:dw|

  14. mathstudent55
    • one year ago
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    |dw:1438714030994:dw|

  15. phi
    • one year ago
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    notice if we treat arcs that "bend the wrong way" as minus, then we can simplify the rule to "find the average of the arcs" in other words we do (a+ -b)/2

  16. mathstudent55
    • one year ago
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    You are correct with 4.

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