Plane mirrors, A, B and C, are shown below. B 110.0 20.0 20.0° 40.0° 50.0° 70.0° + The angle between the incident ray and mirror A is 20.0°. If the angle between mirrors A and B is 110.0° and the angle between mirrors B and C is 90.0°, then the final angle of reflection from mirror C is

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