60 terms · These are sixty math terms that you will likely see on the 6th Grade STAAR Math test.

acute angle

An angle measuing more than 0 degrees and less than 90 degrees

congruent

Having the same size and shape

factor

Any number multiplied to form a product. A product can be divided by one factor to find the other factor.

equivalent

Having the same value

inverse

Reversed position or direction

vertex (vertices - plural)

The point of intersection for two sides of a plane figure, three sides of a solid figure, or the endpoints of two rays that form an angle.

common denominator

A number that is a multiple of all denominators in a problem.

polygon

Three or more line segments in a plane that forms a closed figure. The line segments never cross but meet at their endpoints.

product

The result of multiplying two or more numbers.

prime number

A number with only two factors: the number itself and one.

range

The difference between the least and greatest values in a set of numbers.

scalene triangle

A triangle with sides of different lengths and no two angles are the same.

area

Surface space that is measured in square units.

perimeter

The distance around a figure.

circumference

The distance around a circle (the perimeter of a circle).

angle

The figure formed when two rays meet at a common endpoint called a vertex.

common factor

A number that is a factor of two or more numbers.

complementary angles

Two angles whose sum equals 90 degrees.

diameter

A line segment that passes through the center of a circle and has its endpoints on the circle. It describes how wide the circle is.

greatest common factor (GCF)

The largest single factor for two or more numbers.

hexagon

A polygon with six sides.

integers

All whole numbers (both positive and negative) and zero.

mean

The sum of a group of numbers divided by the number of numbers. Also known as the average.

median

A value found by ordering a group of data from least to greatest and choosing the middle value of the group.

mode

In a group of values, the value that occurs most often.

numerator

The part of a fraction that stands for how many parts of a whole or group are included in the fraction.

A polygon that has four sides.

parallelogram

A quadrilateral with two pairs of congruent, parallel sides.

rectangle

A parallelogram with four right angles

sample

Part of the population that is studied to find the characteristics of the whole population.

composite number

A positive whole number with more than two factors. In other words, a number that is not prime. Zero and one are neither composite nor prime.

denominator

The part of a fraction that stands for the number of equal parts a whole or group is divided into.

cross product

In an equation made up of two fractions, the numerator of one fraction times the denominator of the other fraction.

improper fraction

A fraction with a numerator that is larger than or equal to its denominator.

like fractions

Two or more fractions that have the same denominator

least common multiple (LCM)

The smallest multiple that two or more numbers have in common

mixed number

A value that combines a whole number and a fractional amount

octagon

An eight-sided polygon

parallel lines

Lines in the same plane that do not intersect. The symbol //

percent

The ratio of a number to 100 (per one hundred). The symbol %

prime factorization

Breaking down a composite number until all of the factors are prime

probability

The likelihood that an event will occur. The probability that an event will occur is 0, 1, or somewhere between 0 and 1.

A length that is half the diameter of a circle; the distance from the center of the circle to the circle itself.

right angle

An angle that measures 90 degrees

right triangle

A triangle with one right angle

supplementary angles

Two angles whose sum is 180 degrees

order of operations

Rules that tell which steps to follow when solving an expression.

inverse operations

Operations that do the exact opposite of each other; they undo each other (addition and subtraction, for example)

lowest terms

A fraction with all common factors (other than 1) factored out of the numerator and denominator

pi

The value that shows the relationship of a circle's circumference to its diameter; it has an approximate value of 3.14

prism

A solid figure that has two congruent, parallel polygons as its bases. Its sides are parallelograms

ratio

A comparison of the two values of two numbers

proportion

An equation stating that two ratios are equal

simplify

To make a fraction easier to work with by taking out common factors. In an expression, combining variables that have like unknowns.

square unit

A unit for measuring area

unit ratio

A ratio that shows the cost per unit of measure

x-axis

The horizontal number line of a coordinate graph

y-axis

The vertical number line of a coordinate graph

x-coordinate

The value on the x-axis used to locate a point on the coordinate graph. It is the first value in an ordered pair.

y-coordinate

The value on the y-axis used to locate a point on the coordinate graph. It is the second value in an ordered pair.