Add a tangent constraint to a sketch
Learn how to use the Tangent tool to constrain a curve and another object in a sketch so that they touch at a single point but never cross each other in Fusion.
Note: The constraint tools are only available in the Sketch contextual tab as you edit a sketch.
Click Sketch > Constraints > Tangent
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The Tangent constraint icon displays next to the cursor in the canvas.
In the canvas, select the sketch geometry you want to constrain.
The sketch geometry snaps to maintain a tangent connection. A constraint badge displays next to the constrained geometry in the canvas, indicating that the geometry is constrained to remain tangent to each other.