Glossary Entries
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | ZValid | Based on proper procedures, a valid approach will lead to the correct solution of a problem. |
Value of a Digit | A value is how much a digit is worth according to its place in a number. |
Variable | 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. |
Variance | The value of the standard deviation squared. |
Vector | Quantity that has magnitude (length) and direction. It may be represented as a directed line segment. |
Venn diagram | A drawing showing relationships among sets. The diagram often shows two or more intersecting circles. |
Verbal Expression | A phrase stating a relationship; can be translated into a mathematical/algebraic expression (e.g., twice a number can be represented as 2n). |
Verbal Form | A mathematical expression or relationship using words rather than symbols. |
Verbally | Expressed in written form or spoken in words. |
Verify | To ascertain or confirm that a mathematical property, concept, or statementis true. |
Vertex | 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. |
Vertical | Vertical describes a direction that is straight up and down. It is perpendicular to the horizon. |
Vertical Angles | The pair of angles that are directly across from each other when two straight lines intersect. They are always non-adjacent angles. |
Vertical Line | A line that has right angles to the horizon. A vertical line is straight up and down. |
Vertical Line Test | 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. |
Vertices | The plural of the term vertex. |
Visual | Any graphic representation such as a chart, picture, diagram, graph, etc. |
Volume | The number of cubic units it takes to fill an object. Metric units of volume are often liters. |
Useful Reference Materials
Wikipedia:https://en.wikipedia.org/wiki/Fraction_%28mathematics%29
Encyclopædia Britannica:
http://www.britannica.com/topic/fraction
University of Delaware:
https://sites.google.com/a/udel.edu/fractions/