Find the measure of angle R
101°
39°
R

Answer:
m<R = 31°
Step-by-step explanation:
Arc QT = 39°
Arc PV = 101°
m<R = ½(arc PV - arc QT) => secant-secant exterior angle measure theorem
m<R = ½(101 - 39)
m<R = ½(62°)
m<R = 31°