What method of pattern development is used to layout a twisted transition?

The triangulation method from the plan view is the correct approach for laying out twisted transitions in sheet metal work. This method relies on creating a framework of triangles to define the geometric shapes involved in the transition. By establishing reference points and using the plan view, fabricators can accurately translate the dimensions and angles required for a twisted transition into a flat pattern that can be cut and shaped accordingly.

The triangulation process is particularly useful in complex shapes like twisted transitions because it allows for precise control over each angle and measurement, ensuring that the final product fits properly when assembled. Understanding how to navigate these transitions using triangulation is vital for sheet metal workers, especially when dealing with non-standard geometries.

Other methods, while useful for various applications, do not provide the same level of accuracy and adaptability for twisted transitions. For instance, the radial line method is typically more suited for circular shapes rather than complex twists, while the square method and parallel line method are traditionally used for simpler linear transitions rather than more intricate configurations.