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6-7-8 absolute value a number's distance from
zero. 6-7-8 acute angle an angle whose measure is
between 0 6-7-8 acute triangle a triangle with three acute
angles. 6-7-8 algorithm step-by -step procedure for
doing a specific task in a finite number of steps 6-7-8 algebraic expression a collection of numbers and/or
variables, and operations 6-7-8 see height 6-7-8 angle two rays with a common
endpoint 6-7-8 arc part of a circle from one point
on the circle to another 6-7-8 area the measure of the surface
inside a closed boundary 6-7-8 Associative Property if a, b, and c are any numbers
being added or multiplied then changing their grouping but
not their order will not change their sum or product
(example: (a +b) + c = a + (b + c) and (ab)c =
a(bc)) 6-7-8 average see mean 6-7-8 bar graph a graph in which horizontal or
vertical bars represent data 6-7-8 base the side of the triangle that
the height/altitude is drawn to 6-7-8 base of a power in an expression requiring
multiplication, the constant or variable that tells what
number is to be multiplied. In the expression 72,
7 is the base 6-7-8 best fit line a straight line drawn through a
cluster of points plotted on a graph 6-7-8 binomial polynomial with two
terms 6-7-8 bit base 10 piece used to represent
one (represents one hundredth when working with
decimals)
GRADE LEVEL(S)
TERM
DEFINITION
and 90
6-7-8 capacity a measure of how much liquid a
container can hold 6-7-8 center the point such that every point
on a circle is the same distance from it 6-7-8 central angle an angle whose vertex is at the
center of a circle 6-7-8 chord any line segment that connects
two points on a circle 6-7-8 circle graph a graph in which a circle and
its interior are divided into parts to represent the parts
of a set of data. Also called a pie graph 6-7-8 circumference the distance around a circle or
sphere 6-7-8 coefficient a number multiplying the
variable. In the term 5X, 5 is the coefficient. 6-7-8 collinear lying on the same
line 6-7-8 Commutative Property if a and b are any numbers,
then changing the order in which they are added or
multiplied will not change the sum or product (example: a +
b = b + a and ab = ba) 6-7-8 complementary angles two angles whose measures total
90 6-7-8 compound inequality the combination of two
inequalities joined by "and" or "or" 6-7-8 composite a whole number that has more
than two whole-number factors 6-7-8 conjugates two binomials whose only
difference is the sign. (x + y) (x - y) 6-7-8 concave having a shape that is thought
of as curving inward; opposite of convex 6-7-8 concentric circles circles that have the same
center but radii of different lengths 6-7-8 cone a 3-dimensional shape having a
circular base, curved surface, and one vertex 6-7-8 congruent two figures that have the same
size and shape 6-7-8 convex having a shape that is thought
of as curving outward; opposite of concave 6-7-8 coordinate plane a plane formed by a horizontal
number line called the x-axis, and a vertical number line
called the y-axis; also known as Cartesian Coordinate
Grid 6-7-8 coordinates see ordered
pair 6-7-8 cosine in a right triangle with acute
angle A, the cosine of angle A is the ratio of the measure
of the leg adjacent to angle A with the measure of the
hypotenuse 6-7-8 counting numbers see natural
numbers 6-7-8 customary system of
measurement the measuring system used most
often in the United States. Units for linear measure
(length, distance) include inch, foot, yard, and mile; units
for weight include ounce and pound; units for capacity
(amount of liquid or other pourable substance a
contain 6-7-8 cylinder a 3-dimensional shape having a
curved surface and parallel circular or elliptical bases
that are the same size (example: can is a
cylinder)
GRADE LEVEL(S)
TERM
DEFINITION
6-7-8 data information gathered by
observation, questioning, or measurement 6-7-8 decagon a polygon with ten
sides 6-7-8 decimal a number written in standard
notation, usually one containing a decimal point 6-7-8 degree ( 1. a unit of measure for
angles; based on dividing a circle into 360 equal parts; 2.
a unit of measure for temperature 6-7-8 denominator the number below the fraction
bar that tells the number of equal parts into which the
whole is divided 6-7-8 density a rate that compares the mass
of an object with its volume 6-7-8 diagonal a segment that connects two
vertices of a polygon and is not a side 6-7-8 diameter a chord that passes through a
circle's center 6-7-8 difference of
squares two perfect squares separated
by a subtraction sign (example: a2 - b2 = (a + b) (a -
b)) 6-7-8 discount the difference between the
regular price and the sale price of an item 6-7-8 discount percent the percent that a sale item is
discounted. It is the ratio of the discount to the regular
price of the item 6-7-8 Distributive
Property for any numbers a, b, c: 1. a(b
+ c) = ab + ac ; 2. a(b - c) = ab - ac 6-7-8 discriminant in the quadratic formula, the
expression b2 - 4ac 6-7-8 to find a quotient of two
numbers 6-7-8 dividend the total amount in a division
problem before dividing; see divide 6-7-8 divisor the number of equal parts or
the number in each equal part; see divide 6-7-8 dodecagon a polygon with twelve
sides 6-7-8 domain ahe set of all the input values
of a function 6-7-8 edge ahe line segment where two
faces of a polyhedron meet 6-7-8 endpoint ahe point at the end of a line
segment or ray 6-7-8 equation a mathematical sentence that
states that one expression equals another
expression 6-7-8 equidistant equally distant from one to the
next 6-7-8 equilateral triangle a triangle with three sides of
the same length 6-7-8 equiangular triangle a triangle in which all three
angles have the same measure 6-7-8 equivalent fractions fractions that have different
numerators and denominators, but represent the same
value 6-7-8 estimate a calculation of a close,
rather than exact, answer 6-7-8 expanded notation a number written as the sum of
each digit times a power of 10 6-7-8 exponent in an expression requiring
multiplication, the constant or variable that tells how many
bases to multiply together. For example, in the expression
72, 2 is the exponent 6-7-8 expression a collection of numbers linked
by mathematical operations
GRADE LEVEL(S)
TERM
DEFINITION
)
(example: 3 * 102 + 4 * 101 +8 * 100 = 348)
6-7-8 face a flat surface on a
3-dimensional shape 6-7-8 factor numbers that are multiplied
together 6-7-8 fair game a game that all players have an
equal chance of winning 6-7-8 flat base 10 piece used to represent
one hundred (represents one when working with
decimals) 6-7-8 flip a motion in a plane that moves
a figure about a line so that its new position is its mirror
image on the opposite side of the line 6-7-8 fraction a number in the form 6-7-8 function 1. a relationship between input
and output in which the output depends on the input; 2. a
relation in which each element of the domain is paired with
exactly one element of the range 6-7-8 geometric solid a 3-dimensional shape bounded
by surfaces. Common geometric solids include the rectangular
prism, square pyramid, cylinder, cone, and sphere 6-7-8 greatest common
factor the largest factor that two or
more numbers have in common 6-7-8 the line formed from the vertex
of a triangle perpendicular to the opposite side of the
triangle; also referred to as altitude 6-7-8 hexagon a polygon with six
sides 6-7-8 hypotenuse in a right triangle, the side
opposite the right angle 6-7-8 image the new figure after
transforming an original figure 6-7-8 improper fraction a fraction that names a number
greater than or equal to 1; a fraction whose numerator is
equal to or greater than its denominator 6-7-8 integers the set of whole numbers and
their opposites 6-7-8 interior angle an angle of a polygon formed by
two adjacent sides 6-7-8 intersect to meet (at a point, line, and
so on) 6-7-8 irrational number a real number that cannot be
expressed as the quotient of two integers 6-7-8 isosceles triangle a triangle that has two sides
of equal length 6-7-8 least common
denominator the smallest number that is a
multiple of two or more numbers 6-7-8 leg of a right
triangle a side of a right triangle that
is not the hypotenuse 6-7-8 like terms terms that contain the same
variable or variables that are raised to the same
power 6-7-8 line graph a graph in which points are
connected by a line or line segments to represent
data 6-7-8 linear equation an equation whose graph is a
straight line 6-7-8 line segment a part of a line consisting of
two endpoints and all the points between them 6-7-8 line symmetry a property of a figure that can
be divided by a line, known as line of symmetry, into two
parts, each of which is the mirror image of the
other 6-7-8 lowest terms a fraction in which the
numerator and denominator have no common factor except
1
GRADE LEVEL(S)
TERM
DEFINITION
,
where a and b are whole numbers and b is not 0. Fractions
are used to name part of a whole object or part of a whole
collection of objects, or to compare two
quantities
6-7-8 a typical or middle value for a
set of numbers. It is found by adding the numbers in the set
and dividing the sum by the number of numbers; also referred
to as the average 6-7-8 median the middle value in a set of
data when the data is listed in order from smallest to
largest (or largest to smallest). If there is an even number
of data points, the median is the mean (average) of the two
middle values 6-7-8 metric system of
measurement A measurement system based on
the base-10 numeration system and used in most countries in
the world. Units for linear measure (length, distance)
include millimeter, centimeter, meter, kilometer; units for
mass include gram and kilogram; units for volume (amount of
liquid or other pourable substance a container can hold)
include milliliter and liter 6-7-8 midpoint the point on a line segment
that is halfway between the two endpoints 6-7-8 mixed number a number that is equal to the
sum of a whole number and a fraction 6-7-8 mode the value or values that occur
most often in a set of data 6-7-8 monomial a number, a variable, or a
product of a number and one or more variables 6-7-8 multiple of a number the product of the number and
any whole number 6-7-8 the set of numbers 1, 2, 3,
4... 6-7-8 negative integers an integer less than
0 6-7-8 nonagon a polygon with nine
sides 6-7-8 nonrepeating decimal a decimal that neither
terminates nor repeats 6-7-8 n-gon a polygon with n
sides 6-7-8 numerator the top number of a fraction
that tells the number of equal parts being
considered
GRADE LEVEL(S)
TERM
DEFINITION
6-7-8 obtuse angle an angle whose measure is
greater than 90 6-7-8 obtuse triangle a triangle that has one angle
that is greater than 90 6-7-8 octagon a polygon with eight
sides 6-7-8 Order of Operations a procedure for evaluating an
expression involving more than one operation. 6-7-8 two numbers in a specific order
used to locate a point on a coordinate grid. They are
usually written inside parentheses 6-7-8 origin the point where the x-axis and
y-axis intersect on a coordinate plane 6-7-8 parabola the general shape of the graph
of a quadratic function 6-7-8 parallel lines,segments, or rays that
are the same distance apart and never meet 6-7-8 parallelogram a quadrilateral whose opposite
sides are parallel and congruent 6-7-8 pentagon a polygon with five
sides 6-7-8 percent the value of a ratio that
compares a number to 100 6-7-8 percent of increase or
decrease an indication of how much a
quantity has increased or decreased. Calculated by dividing
the difference of the two numbers by the original
number 6-7-8 perfect square a number whose square root can
be written as a whole number 6-7-8 perimeter the distance around a
two-dimensional shape 6-7-8 perpendicular two lines, segments, or rays
that intersect to form right angles are said to be
perpendicular to each other 6-7-8 pi the number that is the ratio of
the circumference of a circle to its diameter 6-7-8 plane a flat surface that extends in
all directions without ending 6-7-8 polygon an enclosed figure with
straight line sides that meet at their endpoints 6-7-8 polynomial a monomial or the sum of
monomials 6-7-8 positive integers an integer greater than
0 6-7-8 power an expression containing a base
and an exponent. For example, 72 or
yx 6-7-8 prime a whole number greater than 1
that has exactly two whole-number factors, 1 and
itself 6-7-8 prime factorization a number, expressed as a
product of primes 6-7-8 prism a polyhedron with two parallel
faces (called bases) that are the same size and shape.
Prisms are classified according to the shape of two parallel
bases. The faces of a prism are always bounded by
parallelograms, and are often rectangular 6-7-8 probability a number from 0-1 that
indicates the likelihood that something (an event) will
happen. The closer a probability is to 1, the more likely it
is that an event will happen 6-7-8 product the result obtained by
multiplying two or more numbers 6-7-8 proportion an equation stating that two
ratios are equivalent 6-7-8 pyramid a space figure whose base is a
polygon and whose other faces are triangles that share a
common vertex 6-7-8 Pythagorean Theorem for any right triangle, the sum
of the squares of the lengths of the legs, a and b, equals
the square of the length of the hypotenuse, c (a2
+ b2 = c2)
GRADE LEVEL(S)
TERM
DEFINITION
and less than 180
6-7-8 quadrant one of the four regions in a
coordinate plane formed by the coordinate axes 6-7-8 quadratic equation is an equation of the form y =
x2 or x = y2 ; its graph is a
parabola 6-7-8 quadrilateral a polygon with four
sides 6-7-8 quotient the result of a division
problem; see divide 6-7-8 radical equation equations that contain radicals
with variables in the radicand 6-7-8 radical symbol the symbol 6-7-8 radicand the radicand is the expression
under the radical sign 6-7-8 radius a line segment connecting the
center of a circle to any point on the circle. The word can
also mean the length of this segment 6-7-8 range 1. the difference between the
maximum and minimum in a set of data; 2. the set of all
output values of a function 6-7-8 rate a ratio that compares the
measurements of two different attributes; example: miles per
hour 6-7-8 ratio a comparison of two quantities
with like units. Ratios can be expressed with fractions,
decimals, percents, and words; or they can be written with a
colon between the two numbers being compared 6-7-8 rational number a number that can be written as
the ratio of two integers 6-7-8 ray a straight path that extends
infinitely from a point, called an endpoint 6-7-8 real numbers the set of all rational and
irrational numbers, or all the numbers on a number
line 6-7-8 reciprocal two numbers whose product is
one; example: 6-7-8 rectangular prism a prism with six faces, each
face a rectangle 6-7-8 regular polygon a convex polygon in which all
the sides are the same length and all the angles have the
same measure 6-7-8 relation a relation is a set of ordered
pairs 6-7-8 repeating decimals a decimal that continues a
pattern without end 6-7-8 rhombus a parallelogram whose sides are
equal length; the angles are usually not right angles, but
they may be right angles 6-7-8 right angle an angle that measures
90 6-7-8 right triangle a triangle that has one angle
that is equal to 90
GRADE LEVEL(S)
TERM
DEFINITION
,
indicating the principal or nonnegative root of an
expression
is the reciprocal of 
6-7-8 scalene triangle a triangle that has no sides of
equal length 6-7-8 scientific notation a system of representing
numbers in which a number is written as the product of a
power of 10 and a number that is at least 1 but less than
10 6-7-8 septagon a polygon with seven
sides 6-7-8 sides of an angle two rays that have the same
endpoint 6-7-8 similar two figures that have the same
shape, but not necessarily the same size 6-7-8 sine in a right triangle with acute
angle A, the sine of angle A = the ratio of the measure of
the leg opposite angle A with the measure of the
hypotenuse 6-7-8 skinny base 10 piece used to represent
ten. (Represents one tenth when working with
decimals 6-7-8 slide a motion in the plane that
moves every point of a figure a specified distance along a
straight line 6-7-8 slope the ratio of the difference in
y-coordinates to the difference in x-coordinates for any two
points on the graph of a linear equation 6-7-8 sphere the set of all points in space
that are a given distance (the radius of the sphere) from a
given point (the center of the sphere). A ball is a
sphere 6-7-8 square number a whole number that is the
product of a whole number multiplied by itself. 6-7-8 square root one of two identical factors of
a number 6-7-8 standard form the most familiar way of
representing whole numbers, integers, and decimals by
writing digits in specified places (example: 348) 6-7-8 straight angle an angle that measures
180 6-7-8 supplementary angles two angles whose measures have
a sum of 180 6-7-8 surface area the sum of the areas of all the
faces of a solid figure 6-7-8 tangent in a right triangle, with acute
angle A, the tangent of angle A = the ratio of the measure
of the leg opposite angle A with the measure of the leg
adjacent to angle A 6-7-8 terminating decimal a decimal that contains a
finite number of digits 6-7-8 terms numbers that are added and
subtracted, or the position in a sequence 6-7-8 tessellation repeating congruent figures
that cover a surface without overlapping or leaving
holes 6-7-8 triangular prism a prism whose bases are
triangles 6-7-8 trapezoid a quadrilateral with exactly
one pair of parallel sides. No two sides need to be the same
length 6-7-8 triangle a polygon with three
sides
GRADE LEVEL(S)
TERM
DEFINITION
6-7-8 unfair game a game that all players do not
have an equal chance of winning 6-7-8 variable a letter or other symbol that
represents a number. A variable need not represent one
specific number; it can stand for many different
values 6-7-8 vertical angles intersecting lines form two
pairs of vertical angles. Angles that do not share a
side 6-7-8 vertex the point at which the rays of
an angle, two sides of a polygon, or the edges of a
polyhedron meet 6-7-8 volume the measure of the how much
space is occupied by a solid figure. Volume is measured in
cubic units 6-7-8 whole numbers the set of natural numbers and
zero 6-7-8 word expression an algebraic expression written
in words 6-7-8 x-coordinate the first number of an ordered
pair, the position of the point relative to the horizontal
axis 6-7-8 x- intercept the x-coordinate of the point
where a graph crosses the x-axis 6-7-8 y-coordinate the second number of an ordered
pair, the position of the point relative to the vertical
axis 6-7-8 y-intercept the y-coordinate of the point
where a graph crosses the y-axis
GRADE LEVEL(S)
TERM
DEFINITION
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