Keypoint Curve Tools > Arcs > Arc Tangent to Curve

Allows you to create a keypoint arc tangent to a curve.

Arc Tangent To Curve Options

Degree: Specifies the degree of the curve. The values range from 2 to 7. The default is 6.
Spans: Specifies the number of spans in the curve. The values range from 1 to 14. The default is 1.

Note
The sum of the degree and number of spans cannot exceed 16. When creating rational geometry, as set in Preferences > Construction Options , the Spans option is not available.