...
Note: If you want to create a polyline by joining a series of existing line or arc segments, see Join Polyline or Chain Polyline
...
1. By default, line segments are created (as opposed to arcs). Select each endpoint, or enter segment lengths and angles in the Inspector Bar.
...
Note: You can choose to enter an Angle
...
which is absolute in relation to the world
...
or a Relative Angle
...
which is the angle from the immediately previous segment (arc or line).
...
2. To draw arc segments, select Arc Segment from the local menu or Inspector Bar.
...
After selecting Direction, you can set an Angle (which which is absolute in relation to the world ) and a Relative Angle which which is the angle from the immediately previous segment.
...