Q11 of 56 Page 135

In ΔABC, D is a point on BC such that and ∠B = 70°, ∠C = 50° then find ∠BAD.

Given,



∠B = 70°


∠C = 50°


⇒ ∠A = 180° – (70 + 50)° = 60°



By Converse of Internal Angle Bisector Theorem, if the side opposite to the angle is in the ratio of the other two sides, then the side dividing side opposite to the angle is the internal angle bisector of the triangle.


Thus,


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