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Math Help - Need some help with some pre calc summer math questions

  1. #1
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    Need some help with some pre calc summer math questions

    Here are the questions I am having trouble with, any help would be appreciated, thanks.

    2. Let chords AB and CD of circle O intersect at point E. If BE = x , EA = 3x -1, DE = x -1, and CE = 4x ,
    find the lengths of these chords.

    3. From a point P outside of circle O, let PRbe tangent to the circle at R and let secant PM intersect the circle at
    M and N (with M between P and N). If PM = 9 and MN = 3, find PR.

    4. From a point P outside of circle O, let PR and PS be tangent to the circle at R and S respectively. Find OP if the
    radius of the circle is 5 and PR = 13.

    8. If ABCD is a rectangle and P is any point in its interior, prove that AP2+PC2=PB2+PD2.
    Last edited by Mp5xm8; August 30th 2009 at 09:54 AM.
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  2. #2
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  3. #3
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    These are the problem that i don't understand to do, i was hoping someone could show me how to do them, not the answers...

    The reason I can not show you any work is because i don't understand them.
    Last edited by Mp5xm8; August 30th 2009 at 09:27 AM.
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