There are nine angles smaller than a right angle.
2. Angle AOD= 1/2 Angle AOC= 1/2×50=25 degrees.
Angle BOD= 180-25= 155 degrees.
3. Angle ω= 90-25 = 65 degrees
BOE angle = 180-25-90=65 degrees.
So angle COE= angle BOE
So OE bisects the angle BOC.