Two cones placed base-to-base.
The bicone with base radius 
and half-height 
has surface area and volume
 |  |  |
(1) |
 |  |  |
(2) |
The centroid is at the origin, and the inertia tensor about the centroid is given by
![I=[1/(20)M(2h^2+3r^2) 0 0; 0 1/(20)M(2h^2+3r^2) 0; 0 0 3/(10)Mr^2].](https://txtdot.deep-swarm.xyz/proxy/img?url=https%3A%2F%2Fmathworld.wolfram.com%2Fimages%2Fequations%2FBicone%2FNumberedEquation1.svg) |
(3) |
See also
Dipyramid, Cone, Double Cone, Nappe, Sphericon
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Cite this as:
Weisstein, Eric W. "Bicone." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Bicone.html