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Valid
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Based on proper procedures, a valid approach will lead to the correct solution of a problem. |
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Value of a Digit
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A value is how much a digit is worth according to its place in a number. |
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Variable
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A placeholder in algebraic expressions; for example, in 3x + y = 23, x and y are variables. Those variables can take on any one set of values. It can be a letter or symbol. |
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Variance
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The value of the standard deviation squared. |
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Vector
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Quantity that has magnitude (length) and direction. It may be represented as a directed line segment. |
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Venn diagram
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A drawing showing relationships among sets. The diagram often shows two or more intersecting circles. |
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Verbal Expression
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A phrase stating a relationship; can be translated into a mathematical/algebraic expression (e.g., twice a number can be represented as 2n). |
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Verbal Form
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A mathematical expression or relationship using words rather than symbols. |
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Verbally
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Expressed in written form or spoken in words. |
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Verify
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To ascertain or confirm that a mathematical property, concept, or statementis true. |
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Vertex
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A vertex is the point at which two line segments, lines, or rays meet to form an angle. It could be a common endpoint of two sides of a polygon, the endpoint of two rays that form an angle, or where two or more edges of a three-dimensional solid meet. |
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Vertical
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Vertical describes a direction that is straight up and down. It is perpendicular to the horizon. |
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Vertical Angles
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The pair of angles that are directly across from each other when two straight lines intersect. They are always non-adjacent angles. |
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Vertical Line
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A line that has right angles to the horizon. A vertical line is straight up and down. |
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Vertical Line Test
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A test use to determine if a relation is a function; a relation is a function if there are no vertical lines that intersect the graph at more than one point. |
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Vertices
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The plural of the term vertex. |
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Visual
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Any graphic representation such as a chart, picture, diagram, graph, etc. |
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Volume
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The number of cubic units it takes to fill an object. Metric units of volume are often liters. |
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