The example below shows how to draw a line tangential to a circle using dynamic relations.
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Click Line
on the toolbar to display the Draw Line properties in the State Manager.
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Specify the Start point X
and Y 
parameters. In the example below, the start point is set to origin. Point to the
circle to activate it.
The circle displays in orange.
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Press SHIFT to display the relation points and relation lines.
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Locate the relation in the work area.
The software displays the relation name and icon next to the origin when the relation activates.
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Click the relation. In the example below, the relation point for the tangential relation is selected.
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Click Confirm
or press ENTER to accept the line.
