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On what line are the generators of a cylinder erected in the parallel line method?

  • A.a stretch-out line equal in length to the base circumference
  • B.a line equal in length to the cylinder's axis
  • C.an arc struck with the slant height as radius
  • D.a line equal to the base diameter of the cylinder

Answer: A

The base circle is divided into equal parts and those chord lengths are laid end to end along the straight line, which is why the total equals the circumference. Each generator is then erected at its own station to the height the solid has there.

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