Question

△ABC△ABC is similar to △XYZ△XYZ.

Answer 1

The correct answer is  ∠Y = 75°
because

    45°∠A ∼ ∠X         
         ∠B ∼ ∠Y = 75°   
    60°∠C ∼ ∠Z    
  
  45 + 60 = 105   
  180 -105 = 75