Big Book Quant Question Geometry

[ashieshwatts]

Can we draw straight line from B to AC as a perpendicular to solve this problem ??
after that we can get to know that let say D is 90, A is 30 and the half of B is 60 ??

[cylverixxx]

@ashieshwatts

Can we draw straight line from B to AC as a perpendicular to solve this problem ??

Not required, but sure

@ashieshwatts

half of B is 60 ??

No, we don’t know whether it’s “half of angle b”