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The horizontal trace of a line is the point at which the line, produced if necessary, meets the

  • A.vertical plane
  • B.reference line
  • C.auxiliary plane of projection
  • D.horizontal plane

Answer: D

Correct answer: horizontal plane

The traces of a line are the points at which it pierces the planes of projection: the horizontal trace where it meets the horizontal plane and the vertical trace where it meets the vertical. Both may require the line to be produced beyond its given ends, and together they fix the line completely.

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