Math Vocabulary

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Absolute Value- The number of units a number is from zero on the number line.

Adjacent- Next to, adjoining.

Approximate—Almost exact or correct.

Area--The number of square units contained in the interior of a figure.

Average-The sum of a group of numbers divided by the amount of numbers. Also known as the mean.

Bar Graph-- A. graph that uses rectangular bars to show and compare data.

Bisect—To cut or divide into two equal parts.

Central Tendency— Statistical data measured by the mean, mode, and median.

Circle Graph—A. graph that shows data by dividing a circle into sections that represent the parts of a whole. Also called a pie graph.

Circumference—The distance around a circle.

Complementary Angles—A pair of angles whose sum is 90°.

Coordinate Plane—A place that has a vertical axis and a horizontal axis that intersect in a point called the origin.

Coordinate—The numbers in an ordered pair of numbers.

Data—A collection of facts that can be organized and presented in tables or graphs.

Denominator—The expression written below the line in a common fraction that indicates the number of parts into which one whole is divided.

Diagonal—A line segment that connects two non-consecutive vertices in a polygon.

Diameter—A line segment that passes through the center of a circle and has its endpoints on the circle.

Difference—The answer to a subtraction problem. Dilation—

The process of reducing or enlarging an image.

Dividend—The number being divided in a division problem.

Divisor—The number that divides a quantity in a division problem.

Domain—The set of all first coordinates of a relation (the x-values in an ordered pair).

Equivalent—Having the same value.~v

Estimation—Using approximate values that are easier to work with.

Evaluate—To calculate the numerical value.

Exponent—The number of times the base is used as a factor.

Expression—A combination of numbers and variables connected by one or more signs of operation.

Exterior Angle—An angle that forms a linear pair with an interior angle of a polygon.

Factor—One of two or more quantities that divide a given quantity without a remainder.

Frequency—The number of times a value appears in a collection of data,

Front End Estimation—A form of estimation that uses only the first digit in each number. 658+341 or 600+300 = 900

Graph— 1. A diagram that shows the relation between two sets of numbers as a set of points having coordinates determined by the relation. 2. A pictorial device such as a pie chart used to illustrate the relationship between quantities.

Inequality—Any mathematical sentence that contains <, >, ≠

Integer—The set of whole numbers and their opposites.

Intercept—The distance from the origin to the point which a line, curve, or surface intersects a coordinate axis.

Interest—The amount of money that is paid or charged for the use of money over a certain period of time.

Interior Angle—1. Any of the four angles formed between two straight lines intersect by a third straight line. 2. The angle formed inside a polygon by two adjacent sides.

Line Graph—A graph hi which connected line segments show the changes in data over time.

Median—1. A value found by ordering a group of data from least to greatest and choosing the middle value of the group. 2. A segment that joins a vertex of the triangle and the midpoint of the opposite side. 3. A segment joining the midpoint of the legs of a trapezoid. :

Mode—The number item that appears most often in a set of data.

Numerator—The expression written above the line in a common fraction to indicate the number of parts of the whole.

Opposite—1. Placed or located directly across from or facing each other. 2. Like numbers with opposite signs whose sum is zero.

Ordered Pair—A pair of numbers that correspond to a point in a coordinate plane.

Outcome—One possible result of an experiment or activity.

Parallel—Being an equal distance apart everywhere.

Parallelogram—A. quadrilateral that has two pairs of parallel sides.

Perimeter —The distance around a geometric figure.

Perpendicular -Intersecting to form a right angle.

Polygon—Three or more line segments in a plane that forms a closed figure.

Prime Number-A number with only two factors one and itself.

Principal—Amount of money on which interest is paid or charged.

Probability—The ratio that tells how likely it is that an event will occur.

Product—The result when two values or expressions are multiplied.

Proportion—An equation stating that two ratios are equal.

Quadrant -- One-fourth of a coordinate plane, as divided by the x- and y- axis.

Quotient—The number obtained by dividing one quantity by another.

Radius—1. A line segment that joins the center of the circle with any point on its circumference. 2. A line segment that joins the center of a regular polygon at any of its vertices.

Range- 1. The difference between the least and greatest values in a set of data.2. The set of all second coordinates of a relation (the y values in an ordered pair).

Ratio—A comparison of two numbers by division.

Reciprocal—A, number related to another so that when multiplied together their product is1.

Reflection—A. transformation that flips a figure over a line called the line of reflection.

Rotation— A transformation that turns a figure about a point or an axis.

Sample—A randomly selected group chosen for the purpose of collecting data.

Scale— 1. A system of notation in which the values of numerical expressions are determined by their places relative to the chosen base of the system: decimal scale. 2. A system of ordered marks at fixed intervals used as a reference standard in measurement.

Similar—Figures that have the same shape but are not necessarily the same size.

Simulation—The process of acting out a problem.

Supplementary Angles- A. pair of angles whose sum is 180°.

Transformation—An. operation on a geometric figure.

Translation—A. transformation that moves all of the points in plane a fixed distance in a

given direction.