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Online Math Dictionary: L

Easy to understand math definitions for K-Algebra mathematics
Just scroll down or click on the word you want and I'll scroll down for you!
 

least common multiple
LCM
legs of a right triangle less than
line linear equation linear inequality
logarithm    

 

Least Common Multiple (LCM)
The least common multiple is the smallest number that two (or more) given numbers both divide into.
Examples:  The LCM of 6 and 9 is 18.   The LCM of 4 and5 is 20.   The LCM of 2 and 10 is 10.
A common way to write it is LCM ( 69 ) = 18.
When used during fraction problems, another name for the least common multiple is the "least common denominator" (LCD).

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Legs of a right triangle
The legs of a right triangle are the two sides that are not the hypotenuse.   The legs are the two sides that are on either side of the right (90 degree) angle.
legs of a right triangle
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Less Than
One number is less than another number when that number's value is smaller.
Example:   6 is less than 10.  In math, we write this as   6 < 10.

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Line
line is officially defined by the two points that it passes through.

line

For more info on lines, check out one of the following lessons:
For  graphing - Graphing Lines 
How to find the slope of a line - Slopes
How to find the equation of a line given two points.
The equations of parallel and perpendicular lines.

 

Linear Equation
A linear equation is in the form 
                       linear equation: ax+b=0  where a and b are numbers.
To learn how to solve linear equations, check out my lessons on Solving Equations.

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Linear Inequality
A linear inequality is in the form 
                       linear inequality: ax+b<0  where a and b are numbers.
            
Other signs that are used in linear inequalities are 
To learn how to solve linear inequalities, check out my lessons on Solving Inequalities.

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Logarithm
Most simply put, a logarithm is the inverse of an exponential.

f(x)=logx (to the base n)

The base of this logarithm is b.
For more information on logarithms, check out my logarithm lessons.

graph of a logarithm

 

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