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Put the steps of finding the true shape of a figure inclined to both planes in order.

1. Project a second auxiliary parallel to that line   2. Draw the plan and elevation as given   3. Measure the true shape from the second auxiliary view   4. Project a first auxiliary in which the figure appears as a line

  • A.2, 4, 1, 3
  • B.2, 1, 4, 3
  • C.4, 2, 1, 3
  • D.2, 4, 3, 1

Answer: A

Correct answer: 2, 4, 1, 3

Begin with the plan and elevation as given. Project a first auxiliary on a plane perpendicular to the figure, in which it appears as a straight line - this establishes its attitude. Project a second auxiliary parallel to that line, and therefore parallel to the figure, which shows the true shape. Only then can the dimensions be measured from it.

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