# Math, Grades 6-8 – 54 Words   array

an impressive display

composite number

an integer that is divisible without remainder by at least one positive integer other than itself and one

congruence

the quality of agreeing; being suitable and appropriate

conjecture

believe especially on uncertain or tentative grounds

coordinate geometry

the use of algebra to study geometric properties

coordinate system

a system that uses coordinates to establish position

cube root

a number that when multiplied three times equals a given number

dilation

the act of expanding an aperture

dispersion

experiment

the act of conducting a controlled test or investigation

exponent

notation of how many times to multiply a quantity by itself

fair chance

a reasonable probability of success

frequency

the number of occurrences within a given time period

frequency distribution

a distribution of observed frequencies of occurrence of the values of a variable

grid

a pattern of regularly spaced horizontal and vertical lines

growth rate

the rate of increase in size per unit time

inductive reasoning

reasoning from detailed facts to general principles

integer

any natural number or its negative, or zero

intercept

seize, interrupt, or stop something on its way

linear equation

a polynomial equation of the first degree

maximum

the greatest or most complete or best possible

minimum

the smallest possible quantity

odds

the likelihood of a thing occurring

overestimation

an appraisal that is too high

perspective

a way of regarding situations or topics

plane

an unbounded two-dimensional shape

plane figure

a two-dimensional shape

polygon

a closed plane figure bounded by straight sides

prime factor

the prime factors of a quantity are all of the prime quantities that will exactly divide the given quantity

projection

the act of expelling or ejecting

proportion

relation with respect to comparative quantity or magnitude

an equation in which the highest power of an unknown quantity is a square

a four-sided polygon

random sample

a sample in which every element in the population has an equal chance of being selected

random variable

a variable quantity that is random

range

a variety of different things or activities

rate

a quantity considered as a proportion of another quantity

rational number

an integer or the quotient of two integers

relative frequency

the ratio of the number of observations in a statistical category to the total number of observations

reliability

the quality of being dependable

Roman numeral

a symbol in the old Roman notation

root

underground plant organ that lacks buds or leaves or nodes

sequence

a following of one thing after another in time

simplification

the act of reducing complexity

slope

be at an angle

solid figure

a three-dimensional shape

a screen-oriented interactive program enabling a user to lay out financial data on the screen

square root

a number that when multiplied by itself equals a given number

tessellation

the careful juxtaposition of shapes in a pattern

tetrahedron

any polyhedron having four plane faces

underestimation

an estimation that is too low

unknown

not known

variable

something that is likely to change

vertex

the highest point of something 