Solving a Similarity Problem - Find AB

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The discussion revolves around a geometry problem involving a circle with a diameter of 5 cm and a segment AD measuring 4 cm. The main objective is to find the length of segment AB, which is initially thought to be 6 cm. However, participants suggest that AB is intended to be a tangent to the circle, which complicates the solution. The confusion arises from the lack of explicit information about AB being a tangent, leading to uncertainty in the calculations. Ultimately, the consensus is that AB should be treated as a tangent for the problem to make sense.
Misr
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Hello there ,
http://img8.imageshack.us/img8/3118/circlem.jpg

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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Hello Misr! :smile:
Misr said:
… 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:​
 
Yes I think so too
its just tangent

Thanks for help .
 
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