private void AssertCheckRefPointResults(PointF startPoint, PointF refPoint, PolarCoordinate expectedResult)
{
// ACT
var newPoint = startPoint.Offset(refPoint, 3);
var actual = newPoint.GetPolarCoord();
// ASSERT
Assert.IsTrue(expectedResult.Equals(actual), $"{expectedResult} <> Actual result: {actual}");
}