Online Math Dictionary: V

Easy to understand math definitions for K-Algebra mathematics
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variable vector vertex
vertical volume  


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

red line

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.


red line

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

red line

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

vertical line