AutoCAD terminology — naming of circular features in isometric views In AutoCAD, when placing a circular feature on an isometric drawing using the Ellipse command, that feature is referred to as what?

Introduction / Context:
In an isometric projection, true circles do not appear as circles; they appear as ellipses because of the viewing angle. AutoCAD provides a specific workflow for placing these correctly proportioned shapes on a chosen isoplane so that holes, cylinders, and rounds look correct in an isometric view.

Given Data / Assumptions:

• The drawing mode is isometric (isoplanes set to top/left/right as needed).
• The Ellipse command is used with the Isocircle option.
• The goal is to represent a circular feature in 3D isometric correctly.

Concept / Approach:
AutoCAD’s Ellipse command includes an Isocircle option that constructs an ellipse with the correct proportions for the active isoplane, visually matching a circle oriented in 3D. AutoCAD commonly refers to the resulting shape as an isocircle. This approach maintains visual fidelity without complex projections by the user.

Step-by-Step Solution:

Verification / Alternative check:
Compare an isocircle generated via Ellipse–Isocircle with a freehand ellipse; the isocircle matches the isometric scaling rules, ensuring consistency across drawings and preventing distorted “circles.”

Why Other Options Are Wrong:

• Ellipses/isoellipses: generic or informal; the correct AutoCAD term is “Isocircle.”
• Circles: not geometrically correct in isometric unless drawn as isocircles.
• Elliptic rings: not an AutoCAD command option and implies annuli.

Common Pitfalls:

• Forgetting to set the correct isoplane before drawing, leading to misoriented ellipses.
• Using Offset on isocircles to create concentric features can be problematic; use Ellipse again with correct sizes.

Final Answer:
isocircles