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A point in the third quadrant has its plan

  • A.and elevation both above the reference line
  • B.and elevation both below the reference line
  • C.above the reference line and its elevation below
  • D.below the reference line and its elevation above

Answer: C

Correct answer: above the reference line and its elevation below

The third quadrant is below the horizontal plane and behind the vertical plane. Rotating the planes together brings the point behind the vertical plane up above the reference line in plan, and the point below the horizontal plane down below it in elevation - the exact reverse of the first quadrant arrangement.

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