Answer :

Answer:

  302°

Step-by-step explanation:

You want the measure of arc PRS, given PR is a diameter, and central angle RTS is 122°.

Arc

The measure of arc RS is the same as that of central angle RTS, 122°. The measure of arc PRS is the sum of the measures of its parts:

  arc PRS = arc PR +arc RS

  arc PRS = 180° + 122°

  arc PRS = 302°