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A line inclined at 45 degrees to two isometric axes cannot be scaled directly because it is

  • A.hidden behind the object in that view
  • B.curved rather than straight in isometric
  • C.a non-isometric line
  • D.longer than any isometric line on the object

Answer: C

Being parallel to none of the three axes, it foreshortens by an amount that depends on its own direction rather than by the common ratio. Its ends must be fixed from isometric measurements and the line then drawn between them.

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