It is 47 degrees.
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90 degrees.
137
It is a right angle, or an angle whose measure is 90 degrees or pi/2 radians.
The 3 angles of a triangle always add up to 180 degrees. You have 110 and 43, so that is 153 degrees. Subtract 153 from 180, and that is the remaining angle.
A reflex angle is one whose measure is greater than 180 degrees but less than 360 degrees. Vertical angles can be reflexive.