Tangent lines are lines that smoothly meet an arc or circle. You can draw a line
tangent to one or two circles or arcs. For example you might need a tangent line
in designing a cam.
To draw lines tangent to one curve:
From the left toolbar enable Snap to Lines.
Draw a straight line starting away from the curve. When you approach
the tangent point, the line will snap into the tangent position.
Choose Line | Tangents. The application
will draw all possible tangent lines.
Delete unnecessary lines.
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