In CAD drafting, which command is best for creating a single “line” whose width tapers (varies) along its length, while keeping it as one editable object?
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Acircle
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Beclipse
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Cline
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Dpolyline
Answer
Correct Answer: polyline
Explanation
Introduction / Context:A frequent production task in CAD is drawing a stroke that starts thick and ends thin (or vice versa). In AutoCAD-class systems, this is done by creating a single object with variable width, which is critical for easy editing, snapping, and exporting to CAM/graphics workflows.
Given Data / Assumptions:
- The goal is one contiguous object, not many segments.
- The width must vary along the path (taper).
- We want standard drafting behavior (OSNAP, grips, properties).
Concept / Approach:A polyline supports start width and end width on each segment. By specifying different start/end widths, a taper is formed. This preserves the object as a single entity with editable vertices, widths, and curvature (if fit/spline options are used).
Step-by-Step Solution:
Invoke the Polyline command.Set Start Width to the desired initial thickness.Set End Width to a different value to create taper.Draw the path; the object displays tapered width along its length.Edit later via grips or Properties for precise widths.Verification / Alternative check:Open Properties; confirm Polyline has width values. Print/plot preview to verify stroke appearance at scale.
Why Other Options Are Wrong:
- circle: Creates closed curves with uniform radius, not tapered strokes.
- eclipse: Not a standard CAD draw command; ellipse draws constant-width curves.
- line: Lines have no width property (display thickness is cosmetic only).
Common Pitfalls:Confusing lineweight (plot style) with true polyline width; lineweight is a display/plot attribute, while polyline width is geometric.
Final Answer:polyline