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dinlo 2007-05-21 19:58

F.3 MATHS(已slove)

Refreeing to the figure, the circle with centre O is the inscribed circle of △ABC. it is known that OB and OC
bisects ∠ ABC and ∠ ACB respectively and OD ⊥ OC. If ∠ ABC=40°,∠ACB=30° and the radius of the circle is 5 cm, find the lengths of BC andAC.

請幫手slove Q.10


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