50 terms

7th Grade Math Vocabulary

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Principal
The amount of money deposited or borrowed.
Proportion
An equation stating that two ratios or rates are equivalent.
Lateral Face
One side of a three-dimensional figure. Any flat surface that is not a base.
Indirect Measurement
Finding a measurement using similar figures to find the length, width, or height of objects that are too difficult to measure directly.
Sample Space
The set of all possible outcomes of a probability experiment.
Interquartile Range
A measure of variation in a set of numerical data. It is the distance between first and third quartiles of the data set.
Outlier
A data value that is either much greater or much less greater than the median.
Simulation
A mathematical experiment that approximates a real world process.
Factorial
The product of all the positive integers from one up to and including a given integer.
Quadrant
One of four regions into which the two perpendicular number lines of the coordinate plane separate the plane.
Transversal
The line formed when two parallel lines are intersected.
Permutation
An arrangement, or listing, of objects in which order is important.
Polyhedron
A solid with four or more flat surfaces that are polygonal regions.
Constant of Variation
The constant ratio in a direct proportion.
Base
The faces on the top and bottom of a figure.
Direct Variation
The relationship between two variable quantities that have a constant ratio.
Combination
The arranging together of elements without regard to their order.
Commission
A fee or percentage allowed to a sales representative or an agent for services rendered.
Reciprocal
The multiplicative inverse of a number.
Fundamental Counting Principal
Uses multiplication of the number of ways each event in an experiment can occur to find the number of possible outcomes in a sample space.
Coefficient
A numerical factor in a term of an algebraic expression
Term
A single number or variable, or numbers and variables multiplied together.
Like Terms
Terms whose variables and exponents are the same.
Cross Section
The cross section of a solid and a plane
Rational Number
The set of numbers that can be written in the form a/b, where a and b are integers and b ≠ 0.
Scale Factor
A scale written without units in simplest form.
Mean Absolute Deviation
The absolute deviation of an element of a data set is the absolute difference between that element and a given point.
Integers
The set of whole numbers and their opposites
Ratio
A comparison of two numbers using division.
Unit Rate
A rate with a denominator of 1
Inference
A prediction or conclusion based on data or reasoning.
Probability
The chance that a particular outcome will occur, measured as a ratio of the total possible outcomes.
Theoretical Probability
The number of ways that an event can occur, divided by the total number of outcomes.
Experimental Probability
The ratio of the number of times an event occurs to the total number of trials or times the activity is performed.
Compound Event
Two or more independent events considered together.
Independent Event
An event that is not affected by previous events.
Dependent Event
An event that is affected by previous events.
Rate of Change
A rate that describes how one quantity changes in relationship to another.
Constant of Proportionality
Constant of proportionality the constant value of the ratio of two proportional quantities x and y
Percent of Change
The percent a quantity increases or decreases from its original amount
Markup
The amount of increase to the price of an item.
Complementary Angles
Two angles whose measures have a sum of 90 degrees
Supplementary Angles
Two angles whose sum is 180 degrees
Adjacent Angles
Two angles that share a vertex, a side, and have no interior points in common.
Vertical Angles
Angles that are are formed by two intersecting lines and are opposite each other.
Repeating Decimal
A decimal which has repeating digits or a repeating pattern of digits.
Likely Event
An event that is most likely to happen.
Absolute Value
The distance a number is from zero on a number line
Event
A set of outcomes to which a probability is assigned.
Frequency
The number of times an event occurs within a specific time period.