links to worksheets/solutions:

https://cdn.kutasoftware.com/Worksheets/Precalc/06%20-%20Polar%20Coordinates.pdf

https://cdn.kutasoftware.com/Worksheets/Precalc/06%20-%20Graphs%20of%20Polar%20Equations.pdf

https://cdn.kutasoftware.com/Worksheets/Precalc/06%20-%20Polar%20and%20Rectangular%20Forms%20of%20Equations.pdf