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Online Math Dictionary: V

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!
 

variable vector vertex
vertical volume  

 

Variable
In Algebra, a variable is the letter in an equation that represents an unknown number.
Examples:  2x + 5 = 7       2x - 3y = 6

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Vector
A vector is a ray that has a magnitude (length) and a direction (which way it's pointing.)  Vectors are used a lot in physics and navigation.

vectors

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Vertex
On a polygon, the vertices (the plural of vertex) are the corners.

 

In a parabola, the vertex is the starting point.  The line that cuts the parabolain half (the axis of symmetry) goes right through the vertex.
vextex of a parabola

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Vertical
vertical line is a line that goes up and down...  A vertical line isperpendicular to the horizon.

vertical line

 

Volume
Volume is the amount of space inside of something like a cube.  Volume is always measured using linear measurements (like inches and centimeters) cubed to represent three dimensions.
Example:  For the cube on the right, the volume is 75 cubic inches.  This means that you can fit 75 little one inch cubes inside!
the volume of a cube

 

A B C D E F G H I no 
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