CAD editing: In common CAD workflows (e.g., AutoCAD), can the Offset tool create a larger concentric circle from an existing circle (thereby “enlarging” it by a specified offset distance)?

Introduction / Context:
The Offset tool is a staple in 2D CAD, used to create parallel geometry at a fixed distance. With circles, Offset generates a new circle whose radius differs by the offset distance, sharing the same center (concentric). The statement “You cannot use the Offset tool to enlarge the size of a circle” conflicts with normal CAD behavior. This question verifies basic CAD editing knowledge.

Given Data / Assumptions:

• Software supports standard Offset operations on arcs and circles.
• Users can specify positive distances to create outward (larger) offsets or inward (smaller) ones.
• Graphics and snaps behave normally in the environment used.

Concept / Approach:
Offset for a circle works by adding/subtracting a constant distance to the radius. If r is the original radius and d is the offset, the new radius is r + d (outward) or r - d (inward, if r > d). Because the center remains the same, the result is a concentric circle, which is exactly how one “enlarges” or “shrinks” a circle by a precise amount in CAD without manually editing the radius value.

Step-by-Step Solution:

Verification / Alternative check:
Query radius properties of the new circle; it will equal the original radius plus the offset. Visual inspection shows shared center points, confirming concentricity.

Why Other Options Are Wrong:
Limiting Offset to polylines or specific spaces/modes is incorrect; Offset works on circles in model or paper space with or without dynamic input.

Common Pitfalls:
Offsetting the wrong direction; using a distance greater than the original radius for inward offsets (which can fail); forgetting layer and linetype settings for the new entity.

Final Answer:
Incorrect