Math Geometry and Volume Formulas
Pi (π) = 3.141592….
.
Note: a x b means a multiplied by b. a
2
means a squared
(a times a)
Units are important. Don’t mix units, cancel carefully
Volume of a cube side of a = a
3
Rectangular prism with sides a, b, c = a x b x c
Irregular prism: base x height
Cylinder: base x height = π r
2
h
Pyramid = (1/3) b h
Cone = (1/3) b h = (1/3) π r
2
h
Sphere = (4/3) π r
3
Ellipsoid = (4/3) π r1 r2 r3
Units
Area is measured in cubic units. The volume of a figure is the number of cubes required
to fill it completely, like cubes in a box.
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 Spring '11
 Waring/Rappaport
 Biology, 12 inches, 4 inches, 36 inches, Volume Formulas Pi, a3 Rectangular prism

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