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
[ 本文被dinlo在2007-05-21 22:10重新編輯 ]
