Difference between revisions of "Measure"
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== Sets == | == Sets == | ||
− | The measure of a set is known as the set's [[cardinality]]. If <math>S=\{ | + | The measure of a set is known as the set's [[cardinality]]. If <math>S=\{-2,\,\pi,\,7\}</math>, then the cardinality of set <math>S</math> is <math>3</math>. |
== See Also == | == See Also == |
Revision as of 21:10, 31 October 2006
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In mathematics, measure can mean the amount of degrees in an angle, the length of a line segment, or a function that assigns a number to subsets of a given set.
Contents
Line Segments
The measure of is indicated by
, without the bar on top. If
, then
.
Angles
The measure of is indicated by
. If
, then
.
The measure of an angle can expressed in degrees or in radians.
Sets
The measure of a set is known as the set's cardinality. If , then the cardinality of set
is
.