Bicone
[Image:Bicone.svg|thumb|100px|right]
In geometry, a bicone or dicone is the three-dimensional surface of revolution of a rhombus around one of its axes of symmetry. Equivalently, a bicone is the surface created by joining two congruent right circular cones at their bases.
A bicone has circular symmetry and orthogonal bilateral symmetry.
Geometry
For a bicone with radius and half-height, the volume isand the surface area is
where
is the slant height.