Year 2

Cone

Non-polyhedron bounded by a curved surface and a flat base.
Solid bounded by a conical surface and a plane that does not go through the intersection point of the generating lines, called the apex of the cone.
A cone is bounded by a plane surface called its base and a curved surface called its lateral surface. The vertex of a cone is called an apex. conical_surface
  • If the base of a cone is a circle, then the cone is a circular cone.
  • If the base of a cone is an ellipse, then the cone is an elliptic cone.

Properties

Classification of Cones
Right Oblique
Cones with a circular base cone_droit cone_oblique
Cones with a non‑circular base
 cone_droit_non_discoiodal cone_oblique_non_discoidaL

Formulas

The formula for the surface area A of a right circular cone is A = πr(r + L), where r is the length of the circle's radius and L is the slant height. The formula for the volume V of a right circular cone is V = [latex]\frac{πr^{2}h}{3}[/latex], where r is the length of the circle's radius and h is the height of the cone.

Examples

Many everyday objects have the shape of a cone: funnel paper cone cups, ice-cream cones, Christmas trees, party hats, etc.

See also:

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