Absolute Value

1
Absolute Value

• The distance of a number from zero on a number
  line Shown by I I.
• For example, I-5I 5

2
Acute Angle

• An angle made with a measure less than 90
  a-cute little angle!

3
Acute Triangle

• A triangle with all angles measuring less than
  90

4
Addends

• Numbers added together to find a sum

5
Addition

• The process of joining together numbers to find a
  sum

6
Addition Property of Opposites

• The property states that the sum of a number and
  its opposite equals zero. For example, 12 (-12)
  0.

7
Adjacent Angles

• Angles in the same plane that have a common
  vertex and a common side.

8
Algebraic Expression

• An expression that contains at least one variable

9
Alternate Exterior Angles

• A pair of angles formed by 2 lines intersected by
  a third line

10
Alternate Interior Angles

• A pair of angles formed by 2 lines intersected by
  a third line

11
Angle

• A figure formed by 2 rays with a common endpoint
  called the vertex

12
Arc

• A segment of a circle

13
Area

• The measurement of a regions surface in square
  units (length x width) The number of square
  units needed to cover a given surface

14
Associative Property

• Changing the grouping of the numbers does not
  change the sum or product

15
Associative Property of Addition

• The property that states that for three or more
  numbers, their sum is always the same regardless
  of their grouping

16
Associative Property of Multiplication

• The property that states that for three or more
  numbers, their product is always the same
  regardless of their grouping

17
Asymmetrical

• Not identical on either side of a central line
  not symmetrical

18
Attribute

• A characteristic, property, or quality of
  something

19
Average

• A number that represents the most normal of a set
  of numbers found by adding all the numbers and
  dividing by the of numbers you added together
  also called mean

20
Axis

• A line that is used to form a graph the X-axis
  is horizontal and the Y-axis is vertical

21
Bar Graph

• A graph that uses vertical or horizontal bars to
  display data

22
Base(In Numeration)

• When a number is raised to a power, the number
  that is used as a factor is the base.
• For example, 35 3 x 3 x 3 x 3 x 3 and 3 is the
  base.

23
Base(In Geometry)

• A side of a polygon a face of a 3-D figure by
  which the figure is measured or classified the
  foundation

24
Bisect

• To divide into 2 congruent parts

25
Break

• On a graph, a zigzag on a horizontal or vertical
  scale that indicates that some numbers have been
  omitted

26
Capacity

• How much liquid something will hold The amount
  of space an object has to fill

27
Chord

• A line segment that connects 2 points on a circle

28
Celsius

• Also called Centigrade A metric scale for
  measuring temperature in which 0C is the
  freezing point of water and 100C is the boiling
  point of water

29
Center(Of a circle)

• The point inside a circle that is the same
  distance from all the points on the circle

30
Center(Of a rotation)

• The point about which a figure is rotated

31
Centimeter

• Measures length about as wide as the tip of your
  pinky finger

32
Certain

• In probability, when something is sure to happen
  having a probability of 1

33
Circle

• The set of all points in a plane that are the
  same distance from a given point called the center

34
CircleGraph

• A graph that shows all data as a percentage or
  part of a circle also called a pie graph

35
Circumference

• The distance around a circle (the perimeter)

36
Classify

• To arrange or group something into categories
  according to a rule or certain characteristic

37
Common Denominator

• A common multiple of the denominators of 2 or
  more fractions

38
Common Factor

• A number that is a factor of 2 or more numbers
• For example, 8 is a common factor of 16 and 40

39
Common Multiple

• A number that is a multiple of 2 or more numbers
• For example, 24 is a common multiple of 6 and 8

40
Commutative Property

• Changing the order of the addends or factors does
  not change the sum or product

41
Complementary Angles

• Two angles whose measures add up to 90

42
Composite Number

• A number greater than 1 that has more than 2
  whole-number factors

43
Congruent

• Figures that are the same shape, same size (the 4
  Ss)

44
Congruent Angles

• Angles that have the same measure

45
Constant

• A value that does not change

46
Coordinates

• 2 numbers in a numbered pair used to find or
  define position on a grid also called an ordered
  pair

47
Coordinate Plane

• A plane formed by the intersection of a
  horizontal number line called the x-axis and a
  vertical line called the y-axis

48
Corresponding Angles

• A pair of matching angles made by 2 lines
  intersected by a third line or matching angles
  of 2 or more polygons

49
Cube

• A 3-D figure that has 6 square faces

50
Cup

• Standard measure of capacity about the amount of
  a small coffee cup

51
Cylinder

• A 3-D figure that has 2 circular faces

52
Data

• Another word for information

53
Decagon

• A polygon with 10 sides

54
Decimal

• A decimal number is a number that has a whole
  number part and a fractional whole number part. 
  In general, the numbers to the left of the
  decimal point make up the whole part of the
  number, and the numbers to the right of the
  decimal point make up the fractional whole part
  of the number
• For example, the decimal number 658.125 has a
  whole part of 658 and a fractional whole part of
  125. 

55
DecimalPoint

• A dot written in a number that separates the
  whole number from the fractional part it is read
  as and

56
Degree

• A unit of measure for angles and temperature

57
Denominator

• The bottom number in a fraction it shows how
  many equal parts the whole has been divided into

58
Diagonal

• A line segment that connects 2 non-adjacent
  vertices of a polygon

59
Diameter

• A line segment that passes through the center of
  a circle and has endpoints on the circle or the
  length of that segment

60
Difference

• The answer to a subtraction problem

61
Distance

• How far it is from one point to another

62
Dividend

• The number to be divided in a division problem

63
Divisible

• Can be divided by a number without leaving a
  remainder
• For example, 18 is divisible by 3

64
Division

• Breaking a number into smaller groups of equal
  quantities

65
Divisor

• The number you are dividing by in a division
  problem

66
Dodecahedron

• A polyhedron with 12 faces

67
Edge

• A straight line segment that is the place where 2
  faces of a geometrical solid meet

68
Elements

• The words, numbers, or objects in a set

69
Empty Set

• A set that has no elements

70
Equation

• A mathematical sentence that shows that 2
  expressions are equivalent

71
Equilateral

• Having all sides equal

72
Equilateral Triangle

• A triangle with 3 congruent sides

73
Equivalent

• Having the same value

74
EquivalentDecimals

• Decimals that name the same amount.30 .3

75
Equivalent Fractions

• Fractions that name the same amount or part

76
Estimate

• An answer that is close to the exact answer and
  is found by rounding or other methods to find an
  estimate

77
Even Number

• A number that can be evenly divided by 2 A whole
  number with 0,2,4,6, or 8 in the ones place

78
ExpandedForm

• Numbers broken up into their individual place
  values.
• (ie 234 200 30 4)

79
Exponent

• The number that indicates how many times the base
  is used as a factor
• 23 2 x 2 x 2, 3 is the exponent

80
Expression

• A mathematical phrase that contains operations,
  numbers, and/or variables

81
Face

• A flat side of a polyhedron The planar surface
  of a geometrical solid

82
Fact Family

• 3 numbers used to make 4 related number sentences

83
Factor

• Numbers that are multiplied together to get a
  product

84
Factor Tree

• A diagram showing how a whole number breaks down
  into its prime factors

85
Fahrenheit

• A temperature scale in which 32 is the freezing
  point of water and 212 is the boiling point

86
Foot

• Standard measure of length About the length of
  your forearm
• 12 inches 1 foot

87
Fractions

• A number that shows part of a whole. The
  denominator (bottom number) tells how many pieces
  the whole has been divided. The numerator
  indicates how many of those equal parts are being
  considered.

88
Frequency

• How often something happens in a given time

89
Gallon

• Standard measure of capacity the amount of a
  large milk jug
• 2 quarts 1 gallon

90
Gram

• Measures weight about the mass of a large paper
  clip or a dollar bill

91
Graph

• A picture that shows information in an organized
  way

92
Greater

• The number that is bigger in quantity or amount

93
Greatest Common Factor

• The largest number that is a factor (divisor) of
  2 numbers

94
Heptagon

• A seven-sided polygon

95
Hexagon

• A polygon with 6 sides and 6 angles

96
Hypotenuse

• In a right triangle, the side opposite the right
  angle

97
ImproperFraction

• A fraction in which the numerator is greater than
  the denominator.

98
Inch

• Standard measure of length About the length of
  your bent thumb
• 12 inches 1 foot

99
Integer

• Positive and negative whole numbers and zero NOT
  fractions, decimals or mixed numbers

100
Integer

• A member of the set of whole numbers and their
  opposites Positive and negative whole numbers
  and zero NOT fractions, decimals or mixed
  numbers
• -3, -2, -1, 0, 1, 2, 3

101
IntersectingLines

• Lines that meet at a point

102
Interval

• The space between marked values on a number line
  or the scale of a graph

103
Inverse Operations

• Operations that undo each other addition and
  subtraction or multiplication and division

104
IrregularPolygon

• A polygon in which the sides are not the same
  length and not all the angles have the same
  measure

105
Isosceles Triangle

• A triangle in which 2 sides are the same length

106
Kilometer

• Measures length used to measure long distances
• 1,000 meters 1 kilometer

107
Kilogram

• Measures weight weighs about 2 pounds or the
  weight of a textbook
• 1,000 grams 1 kilogram

108
Length

• The distance from one end of a line segment to
  the other end how long something is

109
Less Than

• The number that is smaller in amount or quantity

110
Like Fractions

• Fractions that have the same denominator

111
Line

• A one-dimensional straight path that is endless
  in both directions

112
LineGraph

• A line graph shows information using lines
  usually shows progression of trends over time

113
Line Segment

• Part of a straight line

114
Linear Equation

• An equation whose solutions form a straight line
  on a coordinate plane

115
Liter

• Measures capacity about as much as a large water
  bottle

116
Lowest CommonDenominator

• The lowest denominator that 2 or more fractions
  have in common also called Least Common
  Denominator

117
Lowest Common Multiple

• The smallest number, other than zero, that is a
  multiple of 2 or more numbers also called Least
  Common Multiple

118
Lowest Term Fraction

• A fraction in which the numerator and
  denominator have no common factors besides 1 a
  simplified fraction

119
Mean

• The sum of the items in a set of data divided by
  the number of items in the set also called
  Average

120
Median

• The middle number or the mean of the 2 middle
  numbers in an ordered set of data

121
Meter

• Measures length about the distance from the
  floor to the doorknob

122
Metric System

• A decimal system of weights and measures that is
  used universally in science and commonly
  throughout the world

123
Midpoint

• The point that divides a line segment into 2
  congruent line segments

124
Mile

• Standard measure of length About 4 loops around
  the Valley View track
• 1 mile 5,280 feet

125
Millimeter

• Measures length about as thick as the skinny
  part of a dime or the tip of your pencil

126
Mixed Number

• A number made up of a whole number that is not
  zero and a fraction
• 3½

127
Mode

• The number or numbers that occurs most frequently
  in a set of data when all numbers occur in the
  same frequency we say there is no mode

128
Multiplication

• Repeated addition Adding the same number a given
  amount of times

129
Multiple

• A multiple of a number is the product of the
  number and any non-zero whole number

130
Negative Number

• A number that is less than zero

131
Net

• An arrangement of two-dimensional figures that
  can be folded to form a polyhedron

132
Nonagon

• A polygon with 9 sides and 9 angles

133
Number Sentence

• A statement that involves numbers and their
  relationship or equality

134
Numerator

• The number written above the line in a fraction
  it tells how many parts of the whole are being
  considered

135
Obtuse Angle

• An angle made with a measure more than 90 the
  big-mouthed angle!

136
Obtuse Triangle

• A triangle containing one obtuse angle

137
Octagon

• A polygon with 8 sides and 8 angles

138
Odd Number

• A whole number that cannot be evenly divided by
  2 a whole number that has 1,3,5,7, or 9 in the
  ones place

139
Opposites

• Two numbers that are equal distance from zero on
  a number line

140
Order of Operations

• A rule for evaluating expressions first perform
  the operation in parentheses, then compute powers
  and roots, then all multiplication from left to
  right, then all addition and subtraction from
  left to right.

141
Ordered Pair

• A pair of numbers that can be used to locate a
  point on a coordinate plane

142
Ordinal Numbers

• A number that expresses position
• (ie, first, second, third)

143
Origin

• The point where the x-axis and the y-axis
  intersect on a coordinate plane (0,0)

144
Ounce

• Standard measure of weight About the weight of a
  large grape

145
Outcome

• A possible result of a probability experiment

146
Output

• The value that results from the substitution of a
  given input into an expression or function
• For the rule y 6x, the input 4 produces an
  output of 24

147
Overestimate

• An estimate that is greater than the exact answer

148
Pair

• A set of 2 2 of a kind

149
Parallel Lines

• Lines that do not intersect and would not ever
  cross if extended in both directions

150
Parallelogram

• A quadrilateral that has 2 pairs of opposite
  sides that are equal and parallel

151
Pentagon

• A polygon with 5 sides and 5 angles

152
Percent

• A ratio comparing a number to 100 A fractional
  number with a denominator of 100
• 45 45 out of 100

153
Perfect Square

• A square of a whole number
• 52 25, so 25 is a perfect square

154
Perimeter

• The distance around a figure
• (Look for the word rim to remind you!)

155
Permutation

• An arrangement of items or events in which order
  is important
• For objects A, B, and C there are 6 different
  permutations ABC, ACB, BAC, BCA, CAB, and CBA

156
Perpendicular Bisector

• A line that intersects a segment at its midpoint
  and is perpendicular to the segment

157
Perpendicular Lines

• Lines that intersect to form right angles

158

• The ratio of a circumference of a circle to the
  length of its diameter Pi 3.14 or 22/7

159
Picture Graph

• A graph that uses pictures to show quantities

160
Pint

• Standard measure of capacity
• 2 cups 1 pint

161
Place Value

• The value given to the space a digit holds
  because of its place in the numeral

162
Plane

• A flat surface that extends forever

163
Point

• An exact location in space

164
Polygon

• A closed figure that is formed entirely by line
  segments

165
Polyhedron

• A 3-D figure with many faces

166
Population

• The whole group being surveyed

167
Positive Number

• A number that is greater than zero

168
Pound

• Standard measure of weight 16 ounces 1 pound
  About the weight of a stapler

169
Power

• The result of repeated multiplication of a number
  by itself

170
Prediction

• A guess about what will happen in the future

171
Prime Factorization

• A number written as the product of its prime
  factors
• 24 2 x 2 x 2 x 3

172
Prime Number

• A whole number greater than 1 that only has
  itself and the number 1 as factors

173
Prism

• A solid figure whose ends are parallel, congruent
  polygons

174
Probability

• The chance that something will or will not occur

175
Product

• The answer to a multiplication problem

176
Proper Fraction

• A fraction in which the numerator is less than
  the denominator.
• For example, ¼ is a proper fraction because 1 is
  less than 4.

177
Pyramid

• A geometric solid formed by triangles-the faces
  of a triangle meet at one point (vertex), they
  have different shaped bases and are named by the
  shape of their base (ie, rectangular pyramid)

178
Quadrant

• The x- and y- axes divide the coordinate plane
  into 4 regions. Each region is called a quadrant.

179
Quadrilateral

• Any polygon with 4 sides

180
Quart

• Standard measure of capacity the amount of a
  skinny milk carton
• 2 pints 1 quart

181
Quotient

• The answer to a division problem

182
Radius

• A straight line that extends from the center of
  the circle to a point on the circumference half
  the diameter

183
Random

• All items in a set of information have an equal
  chance of happening or not happening

184
Range

• The difference between the smallest and largest
  number in a group of numbers

185
Rate

• A ratio that compares 2 quantities measured in
  different units

186
Ratio

• A comparison of 2 quantities by division

187
Ray

• A straight line that extends from a point forever
  in one direction

188
Reciprocal

• One of 2 numbers whose product is 1
• The reciprocal of 2/3 is 3/2

189
Rectangle

• A quadrilateral and parallelogram that has 4
  right angles and 2 pairs of opposite sides that
  are the same length

190
RectangularPrism

• A polyhedron whose bases are rectangles and whose
  other faces are rectangles

191
Reflection

• A translation that is like the image of an object
  as seen as a mirror a flip of a image

192
RegularPolygon

• A polygon with congruent sides and angles

193
Remainder

• The number left over after a division process has
  been completed

194
Repeating Decimal

• A decimal in which one or more digits repeat
  infinitely
• 0.75 .75757575

195
Rhombus

• A quadrilateral and parallelogram that has 4
  equal sides, but no right angles

196
Right Angle

• An angle made with a 90 angle the same shape as
  a corner of a square

197
Right Triangle

• A triangle that has a right angle

198
Rotation

• A translation where a figure turns around a
  center point

199
Rounding

• Replacing a number with an estimate of that
  number to a given place value

200
Sample

• A part of a group being surveyed

201
Scale

• The ratio between 2 sets of measurements

202
Scale Drawing

• A drawing that uses a scale to make an object
  proportionally smaller than or larger than the
  real object

203
Scale Model

• A proportional model of a three-dimensional object

204
ScaleneTriangle

• A triangle in which no sides are the same length

205
Scientific Notation

• A method of writing a very large or very small
  number by using powers of 10
• 1,230,000,000 1.23 x 109

206
Segment

• A part of a line between 2 endpoints

207
Sequence

• A grouping of numbers that are arranged so there
  is a pattern

208
Set

• A group of items

209
Side

• A line bounding a geometric figure one of the
  faces forming the outside of an object

210
Similar

• Figures that are the same shape, but not the same
  size

211
Simplest Form

• A fraction is in its simplest form when the
  numerator and denominator have no common factors
  other than 1.

212
Simplify

• To write a fraction or expression in simplest
  form

213
Simulation

• A model of an experiment, often one that would
  be too difficult or too time-consuming to
  actually perform

214
Skew Lines

• Lines that lie in different planes that are
  neither parallel nor intersecting

215
Solid Figure

• A three-dimensional figure

216
Solve

• To find an answer or a solution

217
Sphere

• A geometrical solid that is shaped like a ball

218
Square

• In geometry, a rectangle with 4 congruent sides

219
Square

• To multiply a number by itself a number raised
  to the second power
• 42 4 x 4

220
Square Number

• A number that is the product of a whole number
  and itself
• 25 is a square since 5 x 5 25

221
Square Root

• One of the 2 equal factors of a number
• 4 and -4 are the square roots of 16

222
Standard Form

• A number written using digits

223
Stem-and-Leaf Plot

• A graph used to organize and display data so that
  the frequencies can be compared

224
Straight Angle

• An angle made with a measure of 180 a straight
  line angle

225
Subset

• A set contained within another set

226
Substitute

• To replace a variable with a number or another
  algebraic expression

227
Subtraction

• The operation of finding the difference between 2
  numbers

228
Sum

• The answer to an addition problem

229
Supplementary Angles

• 2 angles whose sum is 180

230
Surface Area

• The sum of the areas of the faces, or surfaces,
  of a 3-D figure

231
Symmetrical

• The characteristics of a figure that can be
  folded in half and the 2 halves will be identical

232
Terminating Decimal

• A decimal number that ends or terminates
• 6.25

233
Tessellation

• A repeating pattern of plane figures that
  completely covers a plane with no gaps or overlaps

234
Ton

• Standard measure of weight About the weight of
  an elephant
• 2,000 pounds 1 ton

235
Transformation

• A change in the size or position of a figure

236
Translation

• A movement (slide) of a figure along a straight
  line

237
Trapezoid

• A quadrilateral that has exactly 1 set of
  parallel sides

238
Tree Diagram

• A branching diagram that shows all possible
  combinations or outcomes of an event

239
Triangle

• A shape with 3 sides and 3 angles the sum of the
  angles 180

240
Triangle Sum Theory

• The theorem that states that the measures of the
  angles in a triangle add up to 180

241
Triangular Prism

• A polyhedron whose bases are triangles and whose
  other faces are rectangles

242
Underestimate

• An estimate that is less than the actual answer

243
Unit Conversion

• The process of changing one unit of measure to
  another

244
Unlike Fractions

• Fractions that have different denominators

245
Variable

• A quantity that can have several different
  values anything that changes

246
Venn Diagram

• Diagrams in which intersecting circles are used
  to represent different sets of elements a way to
  show similarities and differences

247
Vertex or Vertices

• The point(s) of intersection of rays or line
  segments corner(s)

248
Vertical

• Perpendicular to the horizon upright

249
Vertical Angles

• A pair of opposite congruent angles formed by
  intersecting lines

250
Volume

• The amount of space, measured in cubic units,
  something takes up
• (length x width x height)

251
Whole Number

• A positive number without a fraction or decimal
  part

252
X-axis

• The horizontal axis on a coordinate plane

253
X-coordinate

• The first number in an ordered pair it tells the
  distance to move left or right from the origin

254
Y-axis

• The vertical axis on a coordinate plane

255
Y-coordinate

• The second number in an ordered pair it tells
  the distance to move up or down from the origin

256
Yard

• Standard measure of length About the length from
  your nose to your fingertips
• 3 feet 1 yard

257
Zero

• The numeral indicating none

258
Zero Pair

• A number and its opposite, which add to 0