Answer:
44 degrees.
Explanation:
Interior angles in a triangle add up to 180 degrees. The little square in the top right hand corner of the right-angled triangle indicates a right angle. Right angles are always equal to 90 degrees. Do 180-90-46=44, because there are three angles in the triangle that have a cumulative value of 180 degrees, and we know the value of two of them (90 and 46), so 44 degrees must be the value of the remaining angle.