Question

In the angleABC, it is given that
AB/AC=BD/CD.if <B =70°, <C=50° then <BAD is :
A. 30°
B. 40°
C. 45°
D. 50°
​

Answer 1

Answer:

a)30°

Step-by-step explanation:

We have:

AB/AC = BD/DC

Applying angle bisector theorem,

we can conclude that

AD bisects ∠A.

In ∆ABC,

Angle A+B+C=180°

angle A =180 -angle B -angle C

angle A=180-70-50 =60°

since , angle BAD =angle CAD=1/2 angle BAC

angle BAD=1/2 * 60=30° ---------ANS..

Hope it's helpful..