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A right solid is one whose axis is

  • A.parallel to its base
  • B.of the same length as its base edge
  • C.perpendicular to its base
  • D.inclined to its base

Answer: C

Correct answer: perpendicular to its base

In a right solid the axis, which joins the centre of the base to the apex or to the centre of the other base, stands at right angles to the base. If it is inclined instead the solid is oblique. The distinction governs the drawing: a right solid standing on its base gives a plan of true size and an axis projecting as a point.

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