Results 1 to 4 of 4

Math Help - Points on a circle.3

  1. #1
    Senior Member Mukilab's Avatar
    Joined
    Nov 2009
    Posts
    468

    Points on a circle.3

    In the diagram attached a is the centre ogf the circle (O doesn't work in paint).
    P,Q,R and S are points on the circle
    Angle ROP = 110
    Calculate the angle RSP

    I Don't know how to prove it is a parallelogram (if it is (although I suspect it is)), I need names of laws and if there are specific names given to various angles (not like obtuse or acute but things like RSP is the intercept angle, although I know it's not but I don't know what the intercept angle is)


    This is all GCSE standard, please do not venture further.

    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Dec 2007
    From
    Ottawa, Canada
    Posts
    3,108
    Thanks
    68
    Quote Originally Posted by Mukilab View Post
    This is all GCSE standard, please do not venture further.
    WHAT does that mean?

    Is angle PQR = 35 ?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member Mukilab's Avatar
    Joined
    Nov 2009
    Posts
    468
    No, 55, apologies for that.

    I mean this is for my GCSEs and because I have never taken any maths classes I have to learn this all by myself within an incredibly small amount of time so I do not want people to elaborate because I will simply not remember the equations.

    GCSEs are national exams in England.
    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
    2,551
    Thanks
    12
    Awards
    1
    Quote Originally Posted by Mukilab View Post
    In the diagram attached a is the centre ogf the circle (O doesn't work in paint).
    P,Q,R and S are points on the circle
    Angle ROP = 110
    Calculate the angle RSP
    Hi Mukilab,

    Your drawing leaves something to be desired. If you're using Paint, take your time.

    If angle ROP = 110, and if it is a central angle, then arc RSP is also 110 degrees.

    That leaves 360 - 110 = 250 degrees for arc RQP (the rest of the circle).

    Angle RSP is an inscribed angle that intercepts this arc, so
    it is one-half its measure.

    That makes Angle RSP = 1/2 (250) or 125 degrees.

    I don't know what a parallelogram has to do with anything.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. points on a circle...
    Posted in the Geometry Forum
    Replies: 7
    Last Post: August 29th 2011, 10:20 PM
  2. Replies: 0
    Last Post: August 19th 2011, 06:59 AM
  3. Replies: 4
    Last Post: May 2nd 2010, 03:34 PM
  4. Replies: 7
    Last Post: March 15th 2010, 04:10 PM
  5. Five points on a circle...
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: May 8th 2007, 02:36 PM

Search Tags


/mathhelpforum @mathhelpforum