This could be the first step to any of several constructions:
- perpendicular bisector of WA
- copying angle AWR
- a circle through W, A, and R
- marking a point on AR that is the given distance from W
- line through W perpendicular to AR
- line through W parallel to AR
The finishing steps depend on the intent of the construction. There is insufficient information provided here to tell which it is. Perhaps the context provided by the lesson or other problems could help you answer this.
