Hi Sven, Barry has the right solution above (thank you Barry). Just in case it's not clear it's done by creating this construction geometry -

A 57mm circle centered on the juncture point:



Offset these lines also by 57mm:



The intersection between the circle and the offset lines will yield the center of the arcs:



So then draw an arc from center point, put the center point onto that circle/offset line intersection, first point of arc at the juncture point and the last point at the snap point on the original lines.

- Michael

The circle or arc tangent commands can do "tangent to 3 curves", "tangent to 2 curves through a point", or "tangent to 2 curves with a specified radius".

But in your case here you don't want any those, you want "tangent to one curve through a point with a specified radius".

So the circle or arc tangent commands won't help for this case but this type of "specified radius through a point" problem can be solved by some construction geometry, you first set up a circle of the target radius centered on the point.

- Michael

Thank you for answers and explanations everbody. Wonderful forum.

Sven