Dimensioning on auxiliary views: when placing dimensions along an inclined feature so that true length is reported, which dimension tool is appropriate?

Introduction / Context:
Auxiliary views present true size of inclined features. To reflect true lengths, the dimensioning method must measure along the actual direction of the feature rather than the horizontal or vertical axes of the sheet.

Given Data / Assumptions:

• An auxiliary view has been created perpendicular to the inclined surface.
• The feature to be dimensioned lies along an incline.
• We need the displayed value to equal the true length of that feature.

Concept / Approach:
Aligned dimensions measure directly between points along the line connecting them. Linear dimensions constrain to horizontal or vertical directions and can give foreshortened values. Therefore, the Aligned dimension tool is the correct choice for true length on an incline.

Step-by-Step Solution:

Verification / Alternative check:
Compare the aligned dimension value with the known model distance measured using a direct distance query along the same incline; they should match.

Why Other Options Are Wrong:

• Linear dimension: Often constrained to X or Y, causing foreshortened readings.
• Baseline dimension: Useful for chained references, but not specifically for true-length along an incline.
• Angle dimension: Measures angle, not length.

Common Pitfalls:
Using linear dimensions out of habit can misstate lengths on inclined geometry; always choose aligned for true-length reporting.

Final Answer:
Aligned dimension