Okay, here we have this:
Considering the provided figure and information, we are going to calculate the requested measure of the angle, so we obtain the following:
So let's remember that the measure of the angle formed by two tangents is equal to the line of the two arcs formed in the circle divided by two, then we have:
m∠2=(measure of arc PQR-measure of arc PR)/2
m∠2=(250°-110°)/2
m∠2=(140°)/2
m∠2=70°
Finally we obtain that the measure of angle 2 is equal to 70°.