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## Math Vocabulary

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Title: Math Vocabulary

1
Math Vocabulary
2
odd
• An odd number can not be divided into two equal
groups. You only need to check the last digit to
tell if a number is odd.

3
obtuse angle
• An obtuse angle measures more than 90 degrees.

4
Acute angle
• An acute angle measures less than 90 degrees.

5
Probability
• Probability is the likelihood or chance that
something will happen.

6
area
• The area is the number of square units needed to
cover the surface of the figure.

7
• A quadrilateral is a four-sided polygon with four
angles.

8
Parallel lines
• Two lines are parallel if they would never cross,
even if they went on forever.

9
Perimeter
• The perimeter is the distance around a figure.

6 cm
11 cm
10
Right angle
• A right angle measures exactly 90 degrees.

11
Perpendicular lines
• Two lines are perpendicular if they make two
right angles.

12
length
• The length is the long side of any object.

15 in
13
fact family
• A fact family has three numbers written four
ways. The top two are addition or
multiplication. The bottom two are either
subtraction or division.

2 3 5 3 2 5 5 - 3 2 5 -
2 3
14
even
• An even number can be divided into two equal
groups. You only need to check the last digit to
tell if a number is even.

15
Intersecting lines
• Two lines are intersecting if they would ever
cross.

16
sum

6 2 8
17
DIGITS
• The symbols 0,1,2,3,4,5,6,7,8,and 9, used to
write numbers.

18
Place Value
• The value of a place a digit has in a number.

Ones
Tens
Hundreds
150
19
Standard Form
• A number written in a way that shows only its
digits.

2,827
20
Expanded Form
• A number written as the sum of the values of its
digits.

2,476
2,000400706
21
line segment
• A line segment is a piece of a line with two ends.

22
Word Form
• A number written in words.

125
one hundred twenty-five
23
Line of Symmetry
• A line of symmetry is a line that divides a
figure into two congruent parts.

24
Open figure
• An open figure is a figure that does not begin
and end at he same point.

25
product
• The product is the answer you get when you
multiply. The product of six and two is twelve.

6 X 2 12
26
Closed Figure
• A closed figure is a figure that begins and ends
at the same point.

27
congruent
• Congruent shapes are the same size and shape, but
they can be translated, rotated or reflected.

28
Parallelogram
• A quadrilateral with opposite sides parallel.

29
Rhombus
• A parallelogram whose four sides are congruent
and whose opposite angles are congruent.

30
fraction
• A fraction tells how a number is divided. The
bottom tells how many total pieces make a whole.
The top tells how many we are counting.

31
Octagon
• An octagon is an eight-sided figure.

32
Parallel
• Two lines that never intersect

33
difference
• The difference is the answer you get when you
subtract. The difference of six and two is four.

6 - 2 4
34
numerator
• The numerator is the top number of a fraction.
The numerator tells how many we are counting.

35
Denominator
• The denominator is the bottom number of a
fraction. The denominator tells the total number
of pieces to make a whole.

36
Hexagon
• A hexagon is a 6 sided polygon.

37
Expanded Notation
• Expanded Notation is the way to write a number by
showing the value of each digit.

2,356 2000300506
38
Equation
• An equation is a number sentence with an answer.

2 9 11 16 3 19
39
quotient
• The quotient is the answer you get when you
divide. The quotient of six and two is three.

6 2 3
40
line
• A line goes on forever.

41
Equally Likely
• Equally Likely is when there are the same chances
for more than one event to happen

42
polygon
• A polygon has straight sides joined together.
The sides are line segments. They are joined at
vertices.

43
Estimate
• To estimate is to form an approximate judgment or
opinion regarding the worth, amount, size, weight

40
50
48
50
44
Multiples
• A multiple is two numbers that form a product
when multiplied

multiples of 4 4, 8, 12, 16, 20, 24, 28, 32
45
Math Vocabulary
46
Triangular Pyramid
• A triangular pyramid is a pyramid having a
triangular base.

47
Triangular Prism
• A triangular prism is a prism composed of two
triangular bases and three rectangular sides.

48
Sphere
• A sphere is a round object whose curved surface
is the same distance from the center to all its
points.

49
Rectangular Prism
• A rectangular prism is a 3 dimensional figure
with 6 rectangular faces.

50
Cube
• A cube is a solid figure with six congruent
square faces.

51
Cylinder
• A cylinder is a solid or hallow object that is
shaped like a can.

52
expression
• An expression is a number sentence without an

2 y 3 8 z
53
face
• The face is the flat side of a 3-d shape.

54
vertices
• Vertices are where two or more edges meet.

55
Reflect
• Reflect means flipping the image over the line.
(FLIP)

56
edges
• The edge is the place where two faces meet.

57
Symmetry
• When one half of a figure looks like the mirror
image of the other half.

58
Rotate
• Rotate means turning the image from a pivot point
to another. (TURN)

59
Translate
• Translate means moving the image horizontally or
vertically. (SLIDE)

60
Translation, Reflection, Rotation
• Translation is to translate, say it again
• To somebody else who didnt understand
• When I look in the mirror I can see my reflection
• Everything is flipped in the other direction
• Rotation is to rotate, make it turn
• These words are not so hard they are easy learn
• So reflection is to flip
• Rotation is to turn
• Translation is to slide it
• Ive got this concept learned!

61
Impossible
• Impossible is not possible. It is unable to be,
exist, or happen.

62
Certain
• To be certain you are free from doubt. You are
confident and sure of the outcome.

63
Possible Outcome
• Possible outcomes of an event are the results
which may occur from any event.

64
double
• A double is a number that has two as a factor.
All even numbers are doubles. You only need to
check the last digit to tell if a number is a
double.

65
capacity
• The capacity is the amount a container can hold
when it is filled.

66
weight
• The weight of an object is the amount or quantity
of heaviness or mass amount a thing weighs.

67
cone
• A cone is a solid, pointed figure that has a flat
round base.

68
foot
• A foot is about the length of a football. 3 feet
1 yard. 5,280 feet 1 mile.

69
yard
• 3 feet 1 yard. A yard is about the length of
a baseball bat. 36 inches 1 yard

70
inch
• An inch is about the length of a paper clip. 12
inches 1 foot. 36 inches 1 yard

71
freezing
• Freezing is 32 degrees Fahrenheit or 0 degrees
Celsius.

72
factor
• A factor tells which groups a number can be
broken into. Ten can be broken into 1 group of
10, 10 groups of 1, 2 groups of 5, or 5 groups of
2.

73
kilogram
• A kilogram weighs about as much as a baseball
bat. A kilogram is a little more than 2 pounds.
1,000 grams 1 kilogram

74
quart
• In the grocery store, a quart is the smaller size
of milk carton. 4 quarts 1 gallon 2 pints
1 quart

a gallon
75
boiling
• Water boils at 212 degrees Fahrenheit or 100
degrees Celsius.

76
inverse
• An inverse is the opposite operation in a fact
family. Addition and subtraction are inverses.
Multiplication and division are inverses.

gt inverse
6 7 13
13 - 7 13
77
Room temperature
• Room temperature is about 70 degrees Fahrenheit
or 20 degrees Celsius.

78
summer heat
• In the summer it gets up to 100 degrees
Fahrenheit or about 40 degrees Celsius.

79
cup
• A cup holds about as much as a school milk
carton. 2 cups 1 pint. 4 cups 1 quart

1 quart
1 pint
80
gram
• A gram weighs about as much as an M M. 1,000
grams 1 kilogram

81
gallon
• 4 quarts 1 gallon. A jug of milk is 1 gallon.

82
ounce
• An ounce weighs about as much as a spoonful of
peanut butter. 16 ounces 1 pound

83
thermometer
• A thermometer measures temperature in Fahrenheit
and Celsius.

84
ton
• A ton weighs about as much as a rhinoceros. 2,000
pounds 1 ton

85
liter
• 1,000 milliliters 1 liter. A liter is about
the size of a sports drink bottle.

86
pound
• A pound weighs about as much as a jar of peanut
butter. 16 ounces 1 pound. 2,000 pounds 1
ton

87
centimeter
• A centimeter is the size of a centimeter cube.
100 centimeters 1 meter.

88
mile
• 5,280 feet 1 mile. A mile is about as far as
you can walk quickly in 15 minutes.

89
milliliter
• A milliliter is about as much as a drop of water.
1,000 milliliters 1 liter

90
meter
• 100 centimeters 1 meter. A meter is about the
length of a baseball bat. 1,000 meters 1
kilometer.

91
triple
• A triple is a number that has three as a factor.
All multiples of three are triples. You only
need to check the digits for threes to tell if a
number is a triple.

92
point
• A point is one little place. On a map a point is
named with x and y.

93
pint
• A pint holds a little more than a can of soda. 2
cups 1 pint. 2 pints 1 quart