In a ΔABC, AD is the bisector of ∠A, meeting side BC at D.
If BD = 2.5cm, AB = 5cm and AC = 4.2cm, find DC.
∠BAD = ∠CAD
We know that, the internal bisector of an angle of a triangle divides the opposite side internally in the ratio of the sides containing the angle.
∴ DC = 2.1 cm
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