Using this, you can create a tangent arc.

1.

Click  button on the toolbar or click Tools > Sketch Entities > Tangent Arc.

2.

You need to select it as start point of another entity.

4.

Pick the End positions of the arc.

·   Center – You can pick a point.

·   Radius – Radius of the arc.

·   Start Point – Start point to sketch the arc.

·   End Point – End point of the arc.