Which of the following statements is true when using Resize Chamfer on selected faces?

When using the Resize Chamfer tool on selected faces in NX, the statement regarding the necessity of a constant width is accurate. The Resize Chamfer feature is designed to create chamfered edges that uniformly adjust the angle and width along the selected edges. By definition, a constant width chamfer maintains a single, uniform dimension across the entire edge or face, ensuring consistency in design and functionality.

Unlike options suggesting varying widths or adjustments that can be made freely, constant width is a defining characteristic of this specific chamfer type. It provides a straightforward design approach, ensuring that the modification applied to the geometry does not lead to complexity in manufacturing or usability. While resizing allows for changes in dimensions, the fundamental property remains that the chamfer will maintain a consistent width across the selected face.

In summary, the aspect of requiring a constant width is key to the functionality of the Resize Chamfer tool, distinguishing it from other types of chamfers that can incorporate variations in width or work on different geometrical forms.