In a ΔABC, 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?
Answer & explanation
Correct answer: option 4
In ∆ABC, if internal bisectors of angles B and C join at D,
⇒ BDC = 90 + BAC /2
Thus, 105 = 90 + A\2
A = 30°