With over 2000 terms defined, this dictionary is ideal for supporting students who are studying mathematics or related subjects. Algebra: The branch of mathematics that substitutes letters for numbers to solve for unknown values. Degree: The unit of an angle's measure represented with the symbol °. Right Triangle: A triangle with one right angle. End Point: The "point" at which a line or curve ends. Hypotenuse: The longest side of a right-angled triangle, always opposite to the right angle itself. Coefficient: A letter or number representing a numerical quantity attached to a term (usually at the beginning). Odd Number: A whole number that is not divisible by 2. Composite Number: A positive integer with at least one factor aside from its own. Factor Tree: A graphical representation showing the factors of a specific number. Mixed Numbers: Mixed numbers refer to whole numbers combined with fractions or decimals. Geometry: The study of lines, angles, shapes, and their properties. Nth Root: The nth root of a number is how many times a number needs to be multiplied by itself to achieve the value specified. Paragraph Writing Practice allows students to create a paragraph using their spelling or vocabulary words. Histogram: A graph that uses bars that equal ranges of values. High school calculus terms are also included in the vast array of words available for drill and practice in the high school math vocabulary lists below. Quadratic equations ask you to find the quadratic polynomial that is equal to zero. One furlong is approximately 1/8 of a mile, 201.17 meters, or 220 yards. Pentagon: A five-sided polygon. Parabola: An open curve whose points are equidistant from a fixed point called the focus and a fixed straight line called the directrix. Line of Symmetry: A line that divides a figure into two equal shapes. Definitions with a high school informational text list. Rectangles, squares, and pentagons are just a few examples of polygons. Evaluate: This word means "to calculate the numerical value". Event: This term often refers to an outcome of probability; it may answers question about the probability of one scenario happening over another. Scalene Triangle: A triangle with three unequal sides. Uniform: Term meaning "all the same". Number Line: A line whose points correspond to numbers. Inequality: A mathematical equation expressing inequality and containing a greater than (>), less than (<), or not equal to (≠) symbol. Norm: The mean or average; an established pattern or form. All terms in our dictionary are cross-referenced and linked for ease of use, making finding information quick and easy. Isometric Paper, Math Charts, Grids, Graph Paper, How to Determine the Geometry of a Circle, Fifth Grade Math - 5th Grade Math Course of Study. Even Number: A number that can be divided or is divisible by 2. Using varying study methods with high school math terms, students can make concrete math connections that will enable them to successfully achieve in higher math. Negative 3 = -3. Planetary orbits take the form of ellipses. Tessellation: Congruent plane figures/shapes that cover a plane completely without overlapping. Congruent: Objects and figures that have the same size and shape. Quadratic Equation: An equation that can be written with one side equal to 0. Qualitative: Properties that must be described using qualities rather than numbers. Ray: A straight line with only one endpoint that extends infinitely. Supplementary Angles: Two angles are supplementary if their sum is equal to 180°. Vocabulary TestMe provides students with the opportunity to take a vocabulary test independently. Centimeter: A metric unit of measurement for length, abbreviated as cm. Graphing Calculator: A calculator with an advanced screen capable of showing and drawing graphs and other functions. Denominator: The bottom number of a fraction. Digit: Digits are the numerals 0-9 found in all numbers. Stem and Leaf: A graphic organizer used to organize and compare data. Uniform can be used to describe size, texture, color, design, and more. The math vocabulary lists are based on the Common Core High School Math Standards. Illustrated Mathematics Dictionary. Algorithm: A procedure or set of steps used to solve a mathematical computation. Play WhichWord? Average: The average is the same as the mean. VocabularySpellingCity provides these high school math word lists to teachers and parents to supplement the high school math curriculum. Protractor: A semi-circle device used for measuring angles. Rhombus: A parallelogram with four sides of equal length and no right angles. Diagonal: A line segment that connects two vertices in a polygon. X-Axis: The horizontal axis in a coordinate plane. Cylinder: A three-dimensional shape featuring two circle bases connected by a curved tube. Cosine: In a right triangle, cosine is a ratio that represents the length of a side adjacent to an acute angle to the length of the hypotenuse. Absolute Value : Always a positive number, absolute value refers to the distance of a number from 0. A Maths Dictionary for Kids Quick Referenceis a device friendly html versionwith definitions and detailed examples for over 955 math words and terms. Ellipse: An ellipse looks like a slightly flattened circle and is also known as a plane curve. Factor: A number that divides into another number exactly. Monomial: An algebraic expression made up of one term. Math Dictionary. Logic: Sound reasoning and the formal laws of reasoning. X-Intercept: The value of x where a line or curve intersects the x-axis. Furlong: A unit of measurement representing the side length of one square acre. Operation: Refers to addition, subtraction, multiplication, or division. Quartic: A polynomial having a degree of 4. Graph Theory: A branch of mathematics focused on the properties of graphs. Quotient: The solution to a division problem. Common Factors: A factor shared by two or more numbers, common factors are numbers that divide exactly into two different numbers. Multiplicand: A quantity multiplied by another. The games and lists are ready-to-use: just select any area and word list and then pick one of the 35+ learning activities. A vertex is where two-dimensional sides or three-dimensional edges meet. These glossaries are to provide permitted testing accommodations of ELL/MLL students.They should also be used for instruction during the school year. Composite numbers cannot be prime because they can be divided exactly. Obtuse Angle: An angle measuring between 90° and 180°. 2.5 cm is approximately equal to an inch. Example: the ratio given when a team wins 4 out of 6 games is 4/6, 4:6, four out of six, or ~67%. Natural Numbers: Regular counting numbers. Face: The flat surfaces on a three-dimensional object. Square Root: A number squared is multiplied by itself; the square root of a number is whatever integer gives the original number when multiplied by itself. High school math students need every advantage possible to make comprehending advanced math easier. Formula: A rule that numerically describes the relationship between two or more variables. For instance, 12 x 12 or 12 squared is 144, so the square root of 144 is 12. Proper Fraction: A fraction whose denominator is greater than its numerator. Ratios can be expressed in words, fractions, decimals, or percentages. + 123 456 78910 firstname.lastname@example.org Y-Intercept: The value of y where a line or curve intersects the y-axis. Reflection: The mirror image of a shape or object, obtained from flipping the shape on an axis. Read MoreRead Less. Angle: Two rays sharing the same endpoint (called the angle vertex). When the total number of values in a list is odd, the median is the middle entry. Attribute: A characteristic or feature of an object—such as size, shape, color, etc.—that allows it to be grouped. Acute Angle: An angle whose measure is between 0° and 90° or with less than 90° radians. Quadruple: To multiply or to be multiplied by 4. Abacus: An early counting tool used for basic arithmetic. Pi: Pi is used to represent the ratio of a circumference of a circle to its diameter, denoted with the Greek symbol π. Radius: A distance found by measuring a line segment extending from the center of a circle to any point on the circle; the line extending from the center of a sphere to any point on the outside edge of the sphere. Irrational: A number that cannot be represented as a decimal or fraction. Similar to a histogram, stem and leaf graphs organize intervals or groups of data. These glossaries may be downloaded, printed and disseminated to educators, parents and ELLs/MLLs. WhichWord? "0, 1, 1, 2, 3, 5, 8, 13, 21, 34..." is a Fibonacci sequence. Improper Fraction: A fraction whose denominator is equal to or greater than the numerator, such as 6/4. Exponent: The number that denotes repeated multiplication of a term, shown as a superscript above that term. Normal Distribution: Also known as Gaussian distribution, normal distribution refers to a probability distribution that is reflected across the mean or center of a bell curve. Quintic: A polynomial having a degree of 5. Bell Curve: The bell shape created when a line is plotted using data points for an item that meets the criteria of normal distribution. Perpendicular: Two lines or line segments intersecting to form a right angle. Subtraction: The operation of finding the difference between two numbers or quantities by "taking away" one from the other. Easy-to-understand definitions, with illustrations and links to further reading. Obtuse Triangle: A triangle with at least one obtuse angle. Percent: A ratio or fraction with the denominator 100. Bar Graph: A graph that represents data visually using bars of different heights or lengths. Y-Axis: The vertical axis in a coordinate plane. Linear Equation: An equation that contains two variables and can be plotted on a graph as a straight line. Inches and centimeters are units of length, pounds and kilograms are units of weight, and square meters and acres are units of area. Use this glossary to find definitions for common math terms. Definitions provides practice recognizing definitions for each spelling and vocabulary word. Perimeter: The total distance around the outside of a polygon. Variable: A letter used to represent a numerical value in equations and expressions. Isosceles: A polygon with two sides of equal length. Example 3 1/2 or 3.5. Venn Diagram: A Venn diagram is usually shown as two overlapping circles and is used to compare two sets. Angle Bisector: The line dividing an angle into two equal angles. VocabularySpellingCity has selected level-appropriate academic vocabulary from all strands of high school math, including geometry, algebra, trigonometry, calculus, statistics and probability. Outcome: Used in probability to refer to the result of an event. BEDMAS or PEMDAS Definition: An acronym used to help people remember the correct order of operations for solving algebraic equations. You can import the word lists into your account and use with any of our 35+ activities. The plane is divided into 4 sections, each called a quadrant. Sector: The area between an arc and two radii of a circle, sometimes referred to as a wedge. Base 10: Number system that assigns place value to numbers. A product is obtained by multiplying two or more multiplicands. Math concepts become more intricate and high school math vocabulary becomes more exacting. Fraction: A quantity that is not whole that contains a numerator and denominator. 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