Online Math Dictionary: V
			
				    Easy to understand math definitions for K-Algebra mathematics
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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. 
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 Vertex On a polygon, the vertices (the plural of vertex) are the corners. 
  
  
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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.
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 Vertical A vertical line is a line that goes up and down...  A vertical line isperpendicular to the horizon. 
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