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Math Help - More circle help

  1. #1
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    More circle help

    use pic 5 for all questions

    4. Given: mBD = 45 degrees, AF = 6

    mCD =

    A. 45
    B. 90
    C. 225
    D. 135

    5. same as question 4

    m<BAD =

    A. 60
    B. 35
    C. 30
    D. 45

    6. Same as question 4.

    BF = ?

    A. 3 *2 (2 is squared = *)
    B. 3 *3
    C. 2 *3
    D. 6
    Attached Thumbnails Attached Thumbnails More circle help-pic-5.gif  
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  2. #2
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    help

    need help
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  3. #3
    A riddle wrapped in an enigma
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    Quote Originally Posted by dgenerationx2 View Post

    use pic 5 for all questions

    4. Given: mBD = 45 degrees, AF = 6

    mCD =

    A. 45
    B. 90
    C. 225
    D. 135

    m\stackrel{\textstyle\frown}{BD}=m\stackrel{\texts  tyle\frown}{CD}=45^{\circ} because a radius perpendicular to a chord bisects the chord and its subtended arc.
    ------------------------------------------
    5. same as question 4

    m<BAD =

    A. 60
    B. 35
    C. 30
    D. 45

    m\angle BAD=45^{\circ} because the measure of a central angle is equal to the measure of its subtended arc.

    ----------------------------------------------
    6. Same as question 4.

    BF = ?

    A. 3 *2 (2 is squared = *)
    B. 3 *3
    C. 2 *3
    D. 6

    AF=BF=6 because \triangle ABF is isosceles.
    ..
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  4. #4
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    you are the master.
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