First of all I'd like to specify that I'm new to Blender and I can do only very basic stuff.
That said, I'm trying to model a sink and I need it to have corners with a given radius. I started by creating only a quarter of the final model so that I can then use the mirror modifier.
I modeled the profile of the sink and then added some loop cuts to round up the mesh using the subdivision surface modifier.
I placed two loop cuts near the corner, placing them at a specific distance from the edge so that they have the same distance from that edge, thinking that in this way the subdivision surface will generate an arc with a radius of that specific distance.
As you can see the corner loop cuts near the corner have moved and now the mesh is not forming a perfect arc on the corner but it is somewhat skewed. I think this is due to the subdivision surface changing those loop cuts' positions. I tried toying around with the modifier's settings but nothing changed.
How can I achieve what I'm looking for?