Cmt Grade 8 Math Vocab

Front 1

Area

Back 1

the measure, in square units, of the region enclosed by a two-dimensional shape

Front 2

Axis (plural: axes)

Back 2

a number line on a graph

Front 3

Bar Graph

Back 3

a graph that uses bar lengths to represent numerical data

Front 4

Circle Graph

Back 4

a graph that uses a circle divided into sections to represent all the parts of a whole

Front 5

Circumference

Back 5

the distance around a circle

Front 6

Congruent Polygons

Back 6

polygons with the same size and shape; congruent polygons have thier corresponding sides congruent and their corresponding angles congruent

Front 7

Coordinate plane

Back 7

a two-dimensional grid with two perpendicular axes, the x-axis and the y-axis

Front 8

Decimal

Back 8

a number with one or more digits to the right of a decimal point that represent tenths, hundredths, thousandths, and so on

Front 9

Edge

Back 9

the line segments fromed by the intersection ot two faces of a solid figure

Front 10

Equation

Back 10

a number sentence with an equal sign

Front 11

Equiangular Polygon

Back 11

a polygon whose angles have the same measure

Front 12

Equilateral Polygon

Back 12

a polygon whose sides all have the same length

Front 13

Exponent

Back 13

a number that tells how many times to use a number as a factor

Front 14

Expression

Back 14

a collection of numbers and variables connected by a noperation or operations

Front 15

Face

Back 15

a flat surface of a three-dimensional figure

Front 16

Formula

Back 16

an equation that shows the relationship between two or more variables

Front 17

Fraction

Back 17

a number that names parts of a whole or part of a set of objects

Front 18

Independent Event

Back 18

an event whose outcomes are not affected by the outcomes of another event

Front 19

Integer

Back 19

any of the set of positive whole numbers (1,2,3,...), their opposites (-1, -2, -3, ...) and 0

Front 20

Irregular Polygon

Back 20

any polygon that is not both equilateral and equiangular

Front 21

Line Graph

Back 21

a graph that uses a broken line to show grends in data or changes in data over time

Front 22

Mean

Back 22

the sum of a set of numbers divided by the number of items in the set

Front 23

Median

Back 23

the middle number when a set of numbers is numerically ordered; if there are two middle numbers, the median is the mean of the two middle numbers

Front 24

Mode

Back 24

the number that appears most often in a set of data; a set of data may have no mode, one mode, or more than one mode

Front 25

Net

Back 25

a two-dimensional figure that can be folded to form a three-dimensional figure

Front 26

Ordered Pair

Back 26

a pair of numbers, usually in the form (X,Y) that can be graphed as a point on a coordinate plane

Front 27

Origin

Back 27

the point on a coordinate plane where the x- and y-axes meet. The ordered pair that describes the origin is (0,0).

Front 28

Percent

Back 28

a ratio of a number to 100

Front 29

Perimeter

Back 29

the sum of the lengths of the sides of a polygon, or the distance around a figure

Front 30

Permutations

Back 30

the various ways in which a set of objects can be arranged

Front 31

Polygon

Back 31

a closed two-dimensional figure made up of line segments that meet at their end points

Front 32

Probability

Back 32

the likelihood that an event will occur, determined by the raio (number of favorable outcomes) / (total number of possible outcomes)

Front 33

Proportion

Back 33

an equation stating that two ratios are equal

Front 34

Radius

Back 34

a line segment that has one endpoint at the center of a circle and the other endpoint on the circle. The radius of a circle has one half the length of a diameter of that circle.

Front 35

Range

Back 35

the difference between the maximum and minimum values in a data set

Front 36

Ratio

Back 36

a comparison of two numbers

Front 37

Rational Number

Back 37

any number that can be expressed as the ratio of two integers with zero excluded as the second term in the ratio; rational numbers can be expressed as terminating or repeating decimals

Front 38

Reflection

Back 38

a transformation that flips a figure often over the x-axis or y-axis

Front 39

Regular Polygon

Back 39

a polygon that is both equilateral and equiangular

Front 40

Rotation

Back 40

a transformation that turns a figure around a point

Front 41

Rotation

Back 41

a transformation that turns a figure around a point

Front 42

Scientific Notation

Back 42

a number written as the product of a number greater than or equal to one and less than 10, and a poswer of 10

Front 43

Similar Polygons

Back 43

polygons with the same shape but not necessarily the same size; similar polygons have corresonding angles congruent and corresponding sides lengths in proportion

Front 44

Stem-and-leaf Plot

Back 44

a display that shows how data are distributed, using the last digits in numbers as leaves and the first digit(s) as stems

Front 45

Transformation

Back 45

a change in a figure's position and sometimes its size; examples of transformations are reflections, rotations, and translations

Front 46

Translation

Back 46

a transformation that slides a figure in a plane

Front 47

Variable

Back 47

a letter that stands for a number in an expression or in an equation

Front 48

Venn Diagram

Back 48

a diagram that uses circles or ovals to show how sets are related

Front 49

Vertex

Back 49

the point where three or more edges meet on a prism or pyramid

Front 50

Volume

Back 50

the measure, in cubic units, of the space enclosed by a solid figure

Front 51

X-axis

Back 51

the horizontal number line on a coordinate plane

Front 52

Y-axis

Back 52

the vertical number line on a coordinate plane

Front 53

X-coordinate

Back 53

the first number in an ordered pair

Front 54

Y-coordinate

Back 54

the second number in an ordered pair

Front 55

Simplify

Back 55

to reduce a fraction, to combine like terms, or to write the answer as a single number

Front 56

Evaluate

Back 56

find the solution for, or simplify the expression

Front 57

Analyze

Back 57

break down into components or essential parts

Front 58

Explain

Back 58

to write at least 5 sentences giving a detailed description of each of the steps performed while working toward solving the problem; an explanation of why your answer is correct using the mathematical rules, theories, or postulates which support your answer

Front 59

Solve

Back 59

find the numerical value which makes the expression true; isolate a variable to show what it is equal to

Front 60

Data

Back 60

information given or derived which is used to answer the problem, typically numerical information

Front 61

Concave

Back 61

a polygon which contains a vertex within the figure; a figure which has edge sections creating the appearance of a cave

Front 62

Convex

Back 62

each vertices of the polygon fall on the outside of the figure

Front 63

Isosceles Trapezoid

Back 63

a quadrilateral with one set of opposite sides parallel and one set of opposite sides equilateral

Front 64

Scalene

Back 64

a polygon which has all unequal sides

Front 65

Isosceles Triangle

Back 65

a triangle with at least two equilateral sides

Front 66

At Least

Back 66

more than or equal to

Front 67

At Most

Back 67

less than or equal to