Elementary Academic Words

Words for students from kindergarten to grade 8, each grade has 4 lists: art, math, science, and social. They are essential vocabulary for elementary academic classes.

Grade 7: Word List - Math

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absolute value  Read Word
a real number regardless of its sign
acute triangle  Read Word
a triangle whose interior angles are all acute
bisector  Read Word
the line that divides something into two equal parts
corresponding angles  Read Word
when two lines are crossed by another line, the angles in matching corners
discount  Read Word
give reduction in price on; an amount or percentage deducted
equilateral triangle  Read Word
a three-sided regular polygon
experimental probability  Read Word
the ratio of the number of outcomes in which a specified event occurs to the total number of trials, not in a theoretical sample space but in an actual experiment.
exponential notation  Read Word
scientific notation, a way of writing numbers that are too big or too small to be conveniently written in decimal form
exterior angles  Read Word
the angle between a side of a rectilinear figure and an adjacent side extended outward
interest  Read Word
the power of attracting or a fixed charge for borrowing money; usually a percentage of the amount borrowed
interior angles  Read Word
the angle between adjacent sides of a rectilinear figure
isosceles triangle  Read Word
a triangle with two equal sides
negative  Read Word
less than zero; having a negative charge; reckoned in a direction opposite to that regarded as positive
obtuse triangle  Read Word
a triangle that contains an obtuse interior angle
outcome  Read Word
result; end or consequence; result of a random trial
permutations  Read Word
rearrangement of the elements of a set
positive  Read Word
involving advantage or good ; greater than zero; very sure; confident
radical sign  Read Word
a sign indicating the extraction of a root
ratio  Read Word
relation which one quantity or magnitude has to another of the same kind; rate; proportion
regular polygon  Read Word
a polygon with all sides and all angles equal
rhombus  Read Word
a parallelogram with four equal sides; an oblique-angled equilateral parallelogram
right triangle  Read Word
a triangle with one right angle
scale factor  Read Word
a number used as a multiplier in scaling
scalene triangle  Read Word
a triangle with no two sides of equal length
theoretical probability  Read Word
the probability that a certain outcome will occur, as determined through reasoning or calculation.
transversal  Read Word
extending or lying across; in a crosswise direction; at right angles to the long axis
unit rate  Read Word
the estimated market value contribution for each unit of an improvement
vertical angle  Read Word
either of two equal and opposite angles formed by the intersection of two straight lines