Applying the central angle theorem, the measure of arc RPQ is: 318 degrees.
What is the Central Angle Theorem?
The measure of a central angle = measure of the arc it subtends.
Measure of angle RPQ = 360 - 42 [central angle]
Measure of angle RPQ = 318°
Measure of arc RPQ = measure of angle RPQ [central angle theorem]
Measure of arc RPQ = 318°
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