User:Jawr256/Stuff/3D

JAWR256 USERSPACE NAVIGATION [edit]
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My Doctor Who stuff	My Doctor Who stuff (alphabetical)
Long names in Doctor Who (9+docs)	Settings of DW serials seen
New series sonic screwdriver uses	Maths coursework formulae
Doctor Who death counts 1 2 3 4	Top trumps
Doctor Who credits 1 2 3 4 5 6 7
Stuff for school
New Europe

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Shape	Volume formula	Surface area formula
Sphere	$V={\frac {4\pi r^{3}}{3}}$	$A=4\pi r^{2}\,$
Tetrahedron	$V={\begin{matrix}{1 \over 12}\end{matrix}}{\sqrt {2}}a^{3}$	$A={\sqrt {3}}a^{2}$
Cube	$V=a^{3}$	$A=6a^{2}$
Octahedron	$V={\begin{matrix}{1 \over 3}\end{matrix}}{\sqrt {2}}a^{3}$	$A=2{\sqrt {3}}a^{2}$
Dodecahedron	$V={\begin{matrix}{1 \over 4}\end{matrix}}(15+7{\sqrt {5}})a^{3}$	$A=3{\sqrt {25+10{\sqrt {5}}}}a^{2}$
Icosahedron	$V={\begin{matrix}{5 \over 12}\end{matrix}}(3+{\sqrt {5}})a^{3}$	$A=5{\sqrt {3}}a^{2}$