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# Help with circle proof please!!! watch

1. Hi, please can you check my answer to this question, I've attatched the diagram.
The question is: Prove that APB and APC are congruent (3 marks)
A B and C are points on the circumference, angle ABC= and ACB, PB and PC are tangents.

BP = CP (the lengths of tangents from a point are equal
Both triangles share the side AP
ABC=ACB and so ABC must be isosceles, and AB=AC

Therefore the triangles APC and APB must be congruent (SSS rule)
2. And would angle ABC be 50 degrees?? =/
3. You didn't attach anything...Can you attach it?
4. lmao. sorry, i've attatched it now.
6. Yeah it's correct.
7. Thanks very much =]

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Updated: April 17, 2006
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