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Homework Help: A Similarity problem

  1. Mar 29, 2010 #1
    Hello there ,
    http://img8.imageshack.us/img8/3118/circlem.jpg [Broken]

    As you see the diameter = 5cm and AD = 4cm
    the required is to find AB
    it seems quite easy ,its just 6cm. I can solve it but when supposing that AB is a tangent (and this is not given in the problem) also i can't make use of the right angle opposite to the radius of this circle , so there must be something wrong with my answer.

    so ,can u help?
    Thanks in advance
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 30, 2010 #2


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    Homework Helper

    Hello Misr! :smile:
    (hmm … not exactly to scale, is it? :rolleyes:)

    I'm sure AB is intended to be a tangent …

    otherwise, B could be anywhere! :biggrin:
  4. Apr 1, 2010 #3
    Yes I think so too
    its just tangent

    Thanks for help .
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