In the given figure if QRS is an equilateral triangle and TQS is an isosceles triangle
Answer: (a) 13o
Angle X = Angle TQS = 47 (Triangle QST is an isosceles triangle then, ST = QT)
Angle Y + Angle TQS = 60 (Triangle PQR is an equilateral triangle)
Then, Y = 60 – 47
= 13 degree.
Then, the value of Y is 13 degree.
Hence, the correct answer is option (a) 13 degree.