Usual solid

In Mathematical elementary, the introduction to the Solid geometry is made through the study of some solid geometrical called solid usual .

Inventory

The usual solids studied in elementary mathematics are
  • the Cube whose example is the die with six faces
  • the right-angled Parallélépipède also called paved illustrated by the box of shoes or milk brick
  • the cylinder of revolution that one meets in the cans
  • the Prisme (solid) prism (limps it of Toblerone or the lead pencil)
  • the Sphère illustrated by the boules ball, the terrestrial sphere or the soap bubble
  • the circular cone illustrated by the horn with ice or the hat of clown
  • the Pyramid the such Pyramids of Egypt
One arranges these various solids in three great fields
  • the prisms in which one finds inter alia
    • the paving stones of which the square
    • the cylinders of which the cylinder of cross-section
  • the cone S including/understanding inter alia
    • the pyramids
    • circular cones

Objective

The study of the usual solids allows, by presenting current objects, to set up the geometrical solid concepts of , of calculation of Volume and calculation of side surface. The observation of these solids makes it possible to define the concept of plan, parallel plans, right-hand sides, lines perpendicular on a plan, orthogonal lines , straight lines parallel with a plan and even of perpendicular plans. This introduction to the geometry of the solid is an open door towards the study of more complex solids like the crystals, the cells of bees, the soccer ball, modeling in drawing 3D

See too

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