Help with circle proof please!!! Watch

TheRandomer
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#1
Report Thread starter 12 years ago
#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.

Answer:
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)
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TheRandomer
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And would angle ABC be 50 degrees?? =/
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CalculusMan
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You didn't attach anything...Can you attach it?
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TheRandomer
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lmao. sorry, i've attatched it now.
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TheRandomer
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anyone? please can someone just check over my answer?
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The Orientalist
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Yeah it's correct.
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TheRandomer
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Thanks very much =]
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