This is a short list of some common mathematical shapes and figures and the formulas that describe them.
Shape | Area | Perimeter/Circumference | Meanings of symbols |
---|---|---|---|
Square | is the length of a side | ||
Rectangle | is length, is breadth | ||
Circle | or | where is the radius and is the diameter | |
Ellipse | where is the semimajor axis and is the semiminor axis | ||
Triangle | is base; is height; are sides | ||
Parallelogram | is base, is height, is side | ||
Trapezoid | and are the bases |
This is a list of volume formulas of basic shapes: [4] : 405–406
The basic quantities describing a sphere (meaning a 2-sphere, a 2-dimensional surface inside 3-dimensional space) will be denoted by the following variables
Surface area:
Volume:
Radius:
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