For Carbide Create Pro, the 3D modeling is intended for decorative work — folks have (ab)used it to get precise dimensions/angles, but that’s not what it’s intended for.
You probably want a traditional 3D CAD tool such as Alibre Atom Workshop:
Other options include:
Autodesk Fusion 360
Shapr3D
Moment of Inspiration
FreeCAD
Blender (there’s a new constraint-based modeler, see cadsketcher.com)