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Angles project true size only when the plane containing the angle and plane of projection are this:

Adjacent
Aligned
Perpendicular
Parallel

Correct Answer: Parallel

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More Questions from Axonometric Projection

Isometric drawings, unlike isometric projections, are drawn using the full length measurements of the actual drawing and lack foreshortening.
If a circle lies in a plane that is not parallel to the plane of projection, the circle projects as an ellipse.
If a circle lies in a plane that is not parallel to the plane of projection, it still projects as a circle.
Nonisometric lines are equally foreshortened.
An isometric drawing is about 50% smaller than the isometric projection.
In isometric drawings, hidden lines are typically omitted.
Dimetric drawings have different foreshortening along all three axis directions.
Parallel partial ellipses equally spaced at the symbolic thread pitch can be used to represent screw threads.
In isometric drawings, an angle may project to appear larger, but never smaller than the true angle depending on its position.
Isometric sectioning is typically not used when drawing open or irregularly shaped objects.

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