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°
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3
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..
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