Outcomes The set of possible results of an experiment. The two sides of a right triangle that form the right angle. Skewed An uneven representation of a set of data. Set Model A representation of groups of objects. Perpendicular Two lines or segments are perpendicular if they intersect to form a right angle. Terms in this set (52) acute angle. y-axis The vertical axis of a coordinate plane. Whole Numbers The whole numbers are the numbers in the following never-ending sequence: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, .... x-axis The horizontal axis of a coordinate plane. Math Explorations Middle School Curriculum, Illustrated Glossary Of Important Math Terms, Teacher Professional Development Information, Teacher Professional Development Application, Research, Publications, and Presentations. Additionally, you could use different colors to accent certain aspects of your definition. Sequence A list of terms ordered by the natural numbers. You can begin constructing your dictionary by writing the definitions for various math terms in your own words, using language that you understand. Output Values The set of results obtained by applying a function rule to a set of input values. Straight Angle An angle with a measure of 180 degrees formed by opposite rays. An angle more than 90 degrees. Transversal Any line that intersects two or more lines at different points. Equal in shape and size. The materials (math glossary) on this web site are legally licensed to all schools and students in the following states only: Hawaii Nevada The absolute value of a number is its distance from zero. Variable A letter or symbol that represents an unknown quantity. A term used to describe fractions, decimals, and percents that are equal. Outlier A term referring to a value that is drastically different from most of the other data values. The original A Maths Dictionary for Kids is an animated, interactive online math dictionary for students which explains over 630 common mathematical terms and math words in simple language with definitions, examples, activities, practice and calculators. Polygon A polygon is a simple, closed, plane figure formed by three or more line segments. The common endpoint of two rays forming an angle. PLAY. Root The nodes in a tree diagram to represent events. Similar Polygons Two polygons whose corresponding angles have equal measures and whose corresponding side lengths form equal ratios. Multiplicity The number of times a factor appears in a factorization. For example, the median of the data set 17, 23, 39, 48 and 57 would be 39. Trichotomy A property stating that exactly one of these statements is true for each real number: it is positive, negative, or zero. For example, to determine the factorial of five (written 5! Negative Integers Integers less than zero. Keep reading to learn how you can build your own math dictionary, as well as how to define some of the terms you might encounter in seventh grade. The circumference of a circle is divided into 360 equal parts or arcs. The product of a specified positive integer and all the positive integers less than it. For example, if you draw a graph, you can use different colors to identify its various parts, such as the x-axis, y-axis and coordinates. Number Line Model A pictorial representation of numbers on a straight line. Zero Pair For any natural number n, n + (−n) is called a zero pair because their sum is zero. Rational Number A number that can be written as a/b where a is an integer and b is a natural number. Range The difference between the largest and smallest values of a data set. 7th grade math vocab for boot camp. A ratio describes the relationship between two quantities. All rights reserved. Browse the definitions using the letters below, or use the Search above. Order Of Operations The order of mathematical operations, with computations inside parentheses to be done first, and addition and subtraction from left to right done last. Perimeter The perimeter of a polygon is the sum of the lengths of its sides. Equivalent ratios are ratios that represent the same relationship. Quadrilateral A plane figure with four straight edges and four angles. This is a comprehensive collection of free printable math worksheets for grade 7 and for pre-algebra, organized by topics such as expressions, integers, one-step equations, rational numbers, multi-step equations, inequalities, speed, time & distance, graphing, slope, ratios, proportions, percent, geometry, and pi. The degree of a term is the sum of the exponents of the variables. Parallel Lines Two lines in a plane that never intersect. The angles formed by using opposite rays from each line are called vertical angles. Prism A type of polyhedron that has two bases that are both congruent and parallel, and lateral faces which are parallelograms. Texas State College of Science and Engineering Mathworks Math Explorations Middle School Curriculum Additional resources for teachers Online Math Learning Tools Illustrated Glossary Of Important Math Terms 7th Grade Mathematics - Important Vocabulary Words It can be hard to keep track of the many vocabulary words associated with these branches of math, but creating your own math dictionary might help you stay on top of the material. The total of the lateral area and base area of a cone. If two polygons are similar the angles that are in the same relative position in the figures are corresponding angles and have equal measures. In football, you need a helmet; in art, you need a paintbrush. Prime Factorization The process of finding the prime factors of an integer. If two lines are cut by a transversal the angles on the same side of the transversal and on the same side of the two lines are corresponding angles. Reading to the Beat: Books for Teens that Celebrate Music, Online Tutoring 3 of 5 Is Online Tutoring Right for Your Child, Warm-up Activities in Reading and English for Grade 6 Students, Practice Material on 7th Grade Math State Exam. Square Root For non-negative numbers x and y, y= x , read “y is equal to the square root of x,” means y² = x. Universal Set A set containing all of the elements under consideration. Solution The value of the variable that makes the equation true. Ray Part of a line that has a starting point and continues forever in only one direction. Obtuse Triangle A triangle that has one obtuse angle.