Method A

1. Drag a circle from the tool bar and pause over one of the point on the segment or line. Wait for the popup to show you attachment points and then select “Shape Point.”
2. Release and drag again to define the radius of the circle (need to specify the same radius size for both circles). Repeat circle creation for other segment point.
3. Drag a line segment tool over one of circle-circle intersection points and pause. Wait for the popup and select “intersection of circles.”
4. Release and drag the other end of the segment over the other circle-circle intersection point and select “intersection of circles” for the attachment.

The screen shot below shows Step #4.