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The distance between the start point and the center determines the radius.
The other end of the arc is determined by specifying the length of a chord
between the start point and the endpoint of the arc.
The resulting arc is always created counterclockwise from the start point.
The included angle between the endpoints of the arc determines the center
and the radius of the arc.
The tangent direction can be specified either by locating a point on the desired
tangent line, or by entering an angle. You can determine which endpoint
controls the tangent by changing the order in which you specify the two
endpoints.
76 | Chapter 2 Commands