Answer:
∠ Y' = 61°
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180° , then
∠ Y = 180° - (90 + 29)° = 180° - 119° = 61°
Since the triangles are similar then corresponding angles are congruent, thus
∠ Y' = ∠ Y = 61°
