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Which of the following statements about dimensioning is true?

  1. Dimensions can only be created from one point

  2. Dimensions must always be in a straight line

  3. Dimensions don't alter the original objects

  4. Dimension lines must always overlap

The correct answer is: Dimensions don't alter the original objects

The statement that dimensions don't alter the original objects is accurate. In AutoCAD and other drafting software, dimensioning is used to communicate the size, location, and geometry of features on a drawing without modifying the actual objects on the drawing itself. When dimensions are added to a drawing, they act as annotations or references to convey information but do not change the design or geometry of the original entities. The other statements imply constraints on how dimensions should be applied, which are not universally true. For instance, dimensions can be created from multiple points, they can be placed in various orientations rather than strictly in straight lines, and dimension lines do not need to overlap; they can be spaced apart depending on the design requirements and clarity needed in the drawing. Thus, the statement about dimensions preserving the original objects maintains a critical principle in drafting and design criteria, ensuring that the integrity of the drawing remains intact while conveying necessary information.