Answer:
y = 63
Step-by-step explanation:
The measure of a tangent- tangent angle is calculated as
y = [tex]\frac{1}{2}[/tex]( difference of intercepted arcs )
The minor arc = 360° - 243° = 117° , thus
y = [tex]\frac{1}{2}[/tex] (243 - 117) = [tex]\frac{1}{2}[/tex] × 126 = 63
