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Every line drawn on a development must be

  • A.foreshortened in the same proportion throughout
  • B.parallel to one edge of the pattern
  • C.drawn to a reduced scale for convenience
  • D.a true length

Answer: D

Since the pattern will be cut and folded, a line short of its true length gives a piece that will not close. Obtaining true lengths for the oblique edges is therefore the substance of most development problems, and the reason auxiliary constructions appear in them.

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