angular floor cut?

[twollifur]

Is there a way to make an angular cut in a floor? I tried creating a mass and then cut geometry, but it didn't allow me to cut the floor. Is there another way to do this?

[damon.sidel]

You could oversize the hole in the floor (either edit the floor or use a Shaft) then at slab edges with an angle.

[Dimitri Harvalias]

A face based or floor hosted family created as a void blend should do the trick. If its at the edge of the floor a slab edge profile can do it for you.