Answer to Question 1
Since (angle 1) and (angle 3) are complementary, (angle 3) = 90 - (angle 1) = 90 - 47.5 = 42.5
(angle 3) = 42.5
Since (angle 1) is congruent with (angle 2) then (angle 2) = (angle 1) = 47.5
(angle 2) = 47.5
Since (angle 2) and (angle 4) are complementary, (angle 4) = 90 - 47.5 = 42.5
(angle 4) = 42.5