# mmv 221-230

## 54 terms · Math Vocabulary Sixth Grade

### absolute value

The distance a number is from zero on a number line

### algebra

A branch of mathematics that solves problems involving unknown numbers represented with variables

### algebraic equation

A statement of equality between two algebraic expressions

### cardinal numbers

A whole number that answers the question "How many?" (0, 1, 2, 3...)

### cents per mile

the cost to transport goods over a distance; the cost to travel or operate a vehicle

### arc

part of a circle; a curve

### chord

line segment whose endpoints are any two points on a circle or curve

### diameter

the length of a straight line passing through the center of a circle and connecting two points on the circumference; a chord that passes through the center of a circle

### origin

the center of a circle; a circle is named by its origin or center point

### tangent

a straight line or plane that touches a curve or curved surface at a point but does not intersect the circle or curved surface

### central angle

an angle whose vertex is the center of the circle and whose sides pass through a pair of points on the circle

### associative property

When adding or multiplying three or more numbers, changing the grouping of numbers will NOT change the value.
ex: (7 + 4) + 8 = 7 + (4 + 8)

### congruent sides

sides of a polygon that have the same length

### cubic foot

The volume equal to a cube that is one foot on each side; ft³

### cubic inch

The volume equal to a cube one inch on each side; in³

### cubic meter

The volume equal to a cube that is one meter on each side; m³

### cubic decimeter

The volume equal to a cube that is one decimeter (one tenth of a meter) on each side; dm³

### one liter

A liquid measure equal to 1 dm³

### cubic millimeter

The volume equal to a cube that is one millimeter on each side; mm³

### distributive property

For all real numbers a, b, and c, a(b+c) = ab+ac and a(b-c) = ab-ac

### equilateral triangle

a triangle with three congruent sides

### expanded notation

A way to write numbers that shows the value of each digit

### experimental probability

Probability based on data from repeating an event (doing an experiment); the ratio of the number of times the desired event occurs to the total number of trials performed

### exponent

The number that indicates how many times the base is used as a factor

### interior angle

the angle inside two adjacent sides of a polygon

### isosceles triangle

A triangle with at least two congruent sides

### median

The middle number in a set of numbers that are listed in order; the value below which 50% of the cases fall

### midpoint

the point that divides a line segment into two congruent segments

### mode

The number that occurs most often in a set of data

### net

A two-dimensional pattern that can be folded to make a three-dimensional solid

### obtuse triangle

a triangle that contains an obtuse interior angle

### ordinal numbers

numbers that describe position or order (first, second . . .)

### pi

The ratio of a circle's circumference to its diameter; approximately equal to 3.14

### range of a function

The set of all output values of a function; the "y" value;
Ex: if the function f(x) = x² is given the values x = {1, 2, 3,...} then its range will be {1, 4, 9,...}

### ratio

a comparison of two numbers by division

### proportion

an equation that states that two ratios are equal

### real number

The type of number we normally use, such as 1, 15.82, -0.1, 3/4
Positive or negative, large or small, whole numbers or decimal numbers are all Real Numbers.

### frequency table

A table for organizing a set of data that shows the number of times each item or number appears.

### reflexive

a quantity or angle or segment is equal to or congruent to itself

### right triangle

a triangle with one right angle

### scale factor

The ratio of the lengths of two corresponding sides of two similar polygons

### substitution

replacing a variable with a number; if a=b, then b can replace a in any expression; an expression may be replaced by another expression that has the same value

### scalene triangle

a triangle with no two sides of equal length

### equilateral triangle

a triangle with three congruent sides

### acute triangle

a triangle that has 3 acute angles

### equiangular triangle

A triangle with 3 congruent angles

### sum of measures

the result of adding the measures of the angles of a polygon

### tax

A contribution for the support of a government required of persons, groups, or businesses within the domain of that government

### supplementary

Two angles whose measures have a sum of 180°

### theoretical probability

Probability of an event based on dividing the number of possible favorable outcomes by the number of total possible outcomes in the sample space; tells you what will PROBABLY happen, NOT what will happen

### transitive property

If a=b and b=c, then a=c; if a>b and b>c then a>c, if a<b and b<c then a<c

### whole

all, the total amount, 100%, one unit

### 180(n-2)

the formula to calculate the sum of the angles of a polygon

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