Results 1 to 5 of 5

Thread: circle questions

  1. #1
    Junior Member
    Joined
    Oct 2008
    Posts
    73

    circle questions

    in attachments
    Attached Files Attached Files
    Follow Math Help Forum on Facebook and Google+

  2. #2
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,550
    Thanks
    15
    Awards
    1
    Quote Originally Posted by dgenerationx2 View Post
    in attachments

    (8)

    $\displaystyle m\widehat{BD}=50^{\circ}$

    $\displaystyle m\widehat{CE}=90^{\circ}$

    $\displaystyle m\widehat{DE}=360-120-50-90=100^{\circ}$

    $\displaystyle m\angle BFC=\frac{1}{2}(m\widehat{BC}+m\widehat{DE})=\frac {1}{2}(120+100)=110^{\circ}$
    Follow Math Help Forum on Facebook and Google+

  3. #3
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,550
    Thanks
    15
    Awards
    1
    (9)

    $\displaystyle 12x=9 \cdot 16$

    $\displaystyle 12x=144$

    $\displaystyle x=12$


    Are we to assume that the external segment of length y is a tangent to the circle? If so, use the tangent secant theorem.

    $\displaystyle y^2=3 \cdot 27$

    $\displaystyle y^2=81$

    $\displaystyle y=\sqrt{81}$

    $\displaystyle y=9$
    Follow Math Help Forum on Facebook and Google+

  4. #4
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,550
    Thanks
    15
    Awards
    1
    (11)

    $\displaystyle 10(x+10)=8(2x+8)$

    $\displaystyle 10x+100=16x+64$

    $\displaystyle 6x=36$

    $\displaystyle x=6$

    Secant lengths are 16 and 20
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Oct 2008
    Posts
    73

    thanks

    thanks a lot
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. last circle questions 4 & 5
    Posted in the Geometry Forum
    Replies: 2
    Last Post: Dec 12th 2008, 01:41 PM
  2. circle questions 3
    Posted in the Geometry Forum
    Replies: 1
    Last Post: Dec 12th 2008, 11:52 AM
  3. 3 more circle questions
    Posted in the Geometry Forum
    Replies: 1
    Last Post: Dec 9th 2008, 01:17 PM
  4. Questions about something with a circle
    Posted in the Geometry Forum
    Replies: 1
    Last Post: Mar 19th 2007, 09:42 AM
  5. 3 Questions on Circle
    Posted in the Geometry Forum
    Replies: 3
    Last Post: Jan 1st 2006, 05:12 AM

Search Tags


/mathhelpforum @mathhelpforum