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7th Grade Math Vocabulary
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Terms in this set (24)
terminating decimal
A decimal number that ends or terminates
repeating decimal
A decimal that repeats a digit or group of digits forever
inverse operations
Operations that are the opposite of each other and cancel each other out. Addition and subtractions are inverse operations, as are multiplication and division
simple interest
Interest earned only on the original principal amount invested
proportional relationship
two quantities increase at the same rate
rational number
a number that can be expressed as a ratio (fraction) of two integers - terminating and repeating decimals are considered rational
irrational number
a number that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal
inequalities
Algebraic statements that have ≠, <, >, ≤, or ≥ as their symbols of comparison.
equivalent fractions
Fractions that have the same value
ratios
a comparison of two quantities using division
slope
The ratio of the rise and the run between any two points in a line
constant of proportionality
In a proportional relationship, equations are of the form y=kx, where k is the constant of proportionality
order of operations
A rule for evaluating expressions: first perform the operations in parentheses, then compute powers, then perform all multiplication and division from left to right, and then perform all addition and subtraction from left to right.
diameter
A chord that passes through the center of the circle
pi
The ratio of the circumference divided by the diameter
circumference
The distance around a circle
area of a circle
A=πr²
similar shapes
Figures with the same shape but not necessarily the same size are similar.
scale factors
Comparing the lengths of corresponding sides of similar figures
pie chart
Chart that shows the relationship of a part to a whole
sample space
The set of all possible outcomes
probability
A number from 0 to 1 that measures the likelihood that an event will occur
percent
A ratio that compares a number to 100
lateral surface area
Sum of the surface areas of all the faces of a space figure except the bases
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