Vai su: http://www.WolframAlpha.com e cerca:
lenght
capacity
weight
time
area
volume
(selziona "a physical quantity" e "a mathematical definition")
parallelepiped
cylinder
prism
Cavalieri's principle
sphere
semisphere
cylinder, sphere
[equilateral cylinder]
cone
pyramid
[apothem of a pyramid]
polyhedron
[dihedral]
solid of revolution
[bisector plane or bisecting plane]
 ALTRO