railway RRB Group D Mock Test Series 2024-25 Quantitative Aptitude Geometry Triangles

In isosceles triangle ΔABC, O is the intersection point of the internal angle bisectors of ∠ABC and ∠ACB. If ∠OBC = 30∘, then find the value of ∠A.

1
30∘
2
150∘
3
60∘
4
10∘
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