Question

please answer this question in solution​

Answer 1

angle DOM = angle OMN (alternate angles)

so angle DOM = 20deg

BOD + DOM + BOM = 360 deg

BOD = 360 - (DOM + BOM)

BOD = 360 - (20 + 310)

BOD = 30 deg

since angle OBA = angle BOD

angle OBA = 30 deg

Answer 2

Step-by-step explanation:

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