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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Grade and Subject |

absolute value

a real number regardless of its sign

acute triangle a triangle whose interior angles are all acute

bisector the line that divides something into two equal parts

corresponding angles when two lines are crossed by another line, the angles in matching corners

discount give reduction in price on; an amount or percentage deducted

equilateral triangle a three-sided regular polygon

experimental probability 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 scientific notation, a way of writing numbers that are too big or too small to be conveniently written in decimal form

exterior angles the angle between a side of a rectilinear figure and an adjacent side extended outward

interest the power of attracting or a fixed charge for borrowing money; usually a percentage of the amount borrowed

interior angles the angle between adjacent sides of a rectilinear figure

isosceles triangle a triangle with two equal sides

negative less than zero; having a negative charge; reckoned in a direction opposite to that regarded as positive

obtuse triangle a triangle that contains an obtuse interior angle

outcome result; end or consequence; result of a random trial

permutations rearrangement of the elements of a set

positive involving advantage or good ; greater than zero; very sure; confident

radical sign a sign indicating the extraction of a root

ratio relation which one quantity or magnitude has to another of the same kind; rate; proportion

regular polygon a polygon with all sides and all angles equal

rhombus a parallelogram with four equal sides; an oblique-angled equilateral parallelogram

right triangle a triangle with one right angle

scale factor a number used as a multiplier in scaling

scalene triangle a triangle with no two sides of equal length

theoretical probability the probability that a certain outcome will occur, as determined through reasoning or calculation.

transversal extending or lying across; in a crosswise direction; at right angles to the long axis

unit rate the estimated market value contribution for each unit of an improvement

vertical angle either of two equal and opposite angles formed by the intersection of two straight lines