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For that same cut, the minor axis of the ellipse measures

  • A.120 mm
  • B.30 mm
  • C.69.3 mm
  • D.60 mm

Answer: D

Correct answer: 60 mm

The minor axis is the diameter itself, 60 mm, whatever the inclination. It lies perpendicular to the direction in which the cut is stretched, so the obliquity does not affect it. Only the major axis lengthens, which is why the ellipse becomes more eccentric as the cut is made shallower.

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