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The horizontal trace of a plane is the line in which the plane meets the

  • A.horizontal plane of projection
  • B.vertical plane of projection
  • C.reference line of the drawing
  • D.auxiliary plane introduced for the true shape

Answer: A

Correct answer: horizontal plane of projection

The traces are where the plane, produced if necessary, cuts the planes of projection: the horizontal trace where it meets the horizontal plane and the vertical trace where it meets the vertical plane. Between them the two traces fix the plane completely, which is why a plane is specified by its traces rather than by any point in it.

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