In △ABC,AE is the external bisector of ∠A, meeting BC produced at E. If AB=10cm,AC=6cm and BC=12cm, then find CE
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Solution
In △ABC,AE is the external bisector of ∠A meeting BC produced at E. Let CE=xcm. Now, by the angle bisector theorem, we have BECE=ABAC⇒12+xx=106 ⇒3(12+x)=5x. ⇒x=18. Hence, CE=18cm.