A Similarity problem

  • Thread starter Misr
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  • #1
Misr
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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
 
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Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Hello Misr! :smile:
… I can solve it but when supposing that AB is a tangent (and this is not given in the problem) …

(hmm … not exactly to scale, is it? :rolleyes:)

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

otherwise, B could be anywhere! :biggrin:
 
  • #3
Misr
385
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Yes I think so too
its just tangent

Thanks for help .
 

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