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Homework Help: Find the unknown side of a Cyclic quadrilateral when d is the diameter or the circle

  1. Dec 9, 2009 #1
    1. The problem statement, all variables and given/known data
    Given a cyclic quadrilateral with side lengths 1, 2, 3 and d (in that order) where d is the diameter of the circle, find d.


    3. The attempt at a solution

    I tried using Ptolemy's theorem and Brahmagupta's formula, but to no avail. Can I get pointed in the correct direction please?
     
  2. jcsd
  3. Dec 10, 2009 #2
    Re: Find the unknown side of a Cyclic quadrilateral when d is the diameter or the cir

    Maybe you can find something useful http://pballew.blogspot.com/2009/10/notes-on-cyclic-quadrilaterals.html" [Broken].
     
    Last edited by a moderator: May 4, 2017
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