If x=34° find the measures of angles 1,2,3

If x = 34°

then ∡ 1 = 90° - 34°
               = 56° (since the sum of the angles of a right angle is 90°)
        
        ∡ 3 = 180° - (90° + x)
              =  180° - (90° + 34°)
              = 56°  (since angles on a straight line add up to 180°)
     
       ∡ 2 = 90° (since the angle opposite to it is 90°)