Explain how you can use the inscribed angle theorem to justify its second corollary, that an angle inscribed iCircle T is shown. Line segments P R and Q S are diameters. Lines are drawn to connect point P and point Q and point S and point R to form 2 triangles. Angle P Q T is 40 degrees. Line P R and Line Q S are diameters of circle T. What is the measure of Arc S R?

50°
80°
100°
120°n a semicircle is a right angle.