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A cylinder is cut by a plane containing its axis. The resulting section is

  • A.a rectangle
  • B.a circle of the base diameter
  • C.an ellipse of maximum eccentricity
  • D.a triangle with its apex on the base

Answer: A

Correct answer: a rectangle

A plane containing the axis cuts both circular ends along a diameter and the curved surface along two generators, which for a right cylinder are parallel straight lines. The figure is therefore a rectangle of the diameter by the height - the largest plane section the cylinder possesses.

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