Find the measure for m(angle)S. (this is inscribed angles, intercepted arcs)

Let's call the center C. If we draw CT we have an isosceles triangle, two radii for sides, so angle S= angle T. The angle SCT=48 degrees; that's what the arc measure means. So the other two satisfy
S + T + 48 = 180
2S = 132
S = 66
Answer: 66 degress