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The auxiliary plane method obtains the true shape by projecting onto a plane

  • A.coincident with the reference line
  • B.parallel to the figure
  • C.perpendicular to the figure
  • D.inclined at forty-five degrees to the figure

Answer: B

Correct answer: parallel to the figure

A plane of projection parallel to the figure receives it without foreshortening, so the auxiliary view is the true shape directly. The whole art of the method lies in arranging that parallelism, which for a figure inclined to both principal planes takes two steps rather than one.

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