In the figure above TS XY and XY TY lt STZ 34o ... - JAMB Mathematics 2009 Question

TXY = XTY = 47^o(Basa angle of an isosceles \(\bigtriangleup\))

< TYZ = 94^o

n^o = 180 - (94^o + 34^o)

= 180^o - 128^o

= 52^o