In ΔABC,it is given that AB/AC=BD/DC.If ∠B=70degree and ∠C=50degree then find ∠BAD.

Question

In ΔABC,it is given that AB/AC=BD/DC.If ∠B=70^o and ∠C=50^o then find ∠BAD.

Answer 1

[Because a line through one  vertex of a triangle divides the opposite sides in the ratio of other two sides, then the line bisects the angle at the vertex.]