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In a ∆ABC, the internal bisectors of the angle B and the angle C intersect at an angle of 105°. What is the value of the angle A?
Question

In a ∆ABC, the internal bisectors of the angle B and the angle C intersect at an angle of 105°. What is the value of the angle A?

A.

52.5°

B.

75°

C.

15°

D.

30°

Correct option is D

Given:
In a ∆ABC,
Internal bisectors of  \angle​ B and \angle​ C intersect and make an angle 105° 
Concept Used: 
In a ∆ABC, 
if the internal bisector of \angleB and C\angle C intersect at point O.
Then, BOC=900+A2\angle BOC = 90^0 + \frac { \angle A}{2} 
Solution:

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