Angles on receding planes: In an oblique drawing, when an angle is specified in degrees on a receding plane, should you convert the value into circular measurements (e.g., radians) before sketching, or can you retain degrees directly?

Introduction / Context:
Oblique drawings depict the front face true size, with receding axes drawn at a chosen angle and scale (cavalier, cabinet, or general). The statement proposes converting degrees to “circular measurements” before sketching an angle on a receding plane. This question clarifies that angular units do not need conversion for drafting purposes.

Given Data / Assumptions:

• Angles are ordinarily specified in degrees in drafting practice.
• Oblique receding axes are set by convention (e.g., 30°, 45°).
• Foreshortening affects lengths along receding axes, not angle unit choice.

Concept / Approach:
Drafting uses degrees for readability. Converting to radians provides no drafting advantage. What matters is constructing the angle correctly relative to the receding axis and applying the chosen foreshortening to lengths, not changing the unit system of the angle itself.

Step-by-Step Solution:

Verification / Alternative check:
CAD input accepts degrees by default; manual drafting tools (protractors) are degree-based. Converting to radians is unnecessary for accurate construction.

Why Other Options Are Wrong:
Limiting correctness to specific oblique types, scales, or the front face misstates the principle; angle units remain degrees regardless.

Common Pitfalls:
Confusing length foreshortening with angular measurement; applying the scale factor to angles (incorrect).

Final Answer:
Incorrect