###
quadrilateral

A polygon with 4 sides.

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triangle

A polygon with 3 sides.

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acute angle

An angle less than 90 degrees.

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addend

A number added to another number. Both numbers are addends.

###
angle

Two lines coming out of one point.

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diagonal

Having a slanted direction.

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difference

The answer to a subtraction problem.

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face

The flat surface of an object.

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hexagon

A polygon with 6 sides.

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obtuse angle

An angle with greater than 90 degrees.

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octagon

An 8 sided polygon.

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pentagon

A 5 sided polygon.

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perpendicular

Intersecting at right angles.

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polygon

A closed figure made with three or more line segments.

###
product

The answer to a multiplication problem.

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quotient

The answer to a division problem.

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prime number

A positive integer that cannot be divided by another number other than itself and one without a remainder.

###
ray

A half-line extending from a point.

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right angle

An angle that is exactly 90 degrees.

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square

A quadrilateral with 4 equal sides and 4 90 degree angles.

###
sum

The answer to an addition problem.

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vertex

A point that 2 figures intersect at.

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whole number

Positive integers and 0

###
mode

The number(s) in a set that occurs the most.

###
range

A list of the numbers in the set, usually in number order.

###
Median

Order the set of numbers from highest to lowest and the number right in the middle is the median.

###
area

Measurement of a surface in square units.

###
congruent

Two figures that are the same size and shape.

###
equation

An array of symbols that are separated into left and right sides and joined by an equal sign.

###
equilateral triangle

A triangle with 3 equal sides.

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isosceles triangle

A triangle with at least 2 equal sides.

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scalene triangle

A triangle with 3 unequal sides.

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parallel

Lines that do not intersect.

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parallelogram

A quadrilateral with opposite parallel lines.

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perimeter

The length around the outside boundary.

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irregular polygon

A polygon with not all sides the same length.

###
rhombus

A parallelogram that opposite congruent angles and sides. Ex: a square that appears to lean.

###
volume

The amount of space a solid body takes up in cubic units . V = L x W x H

###
trapezoid

A quadrilateral with only two parellel sides.

###
numerator

The number on the top of a fraction.

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denominator

The number Down on the bottom of a fraction that represents the total.

###
factor

Numbers multiplied together in a math problem.

###
remainder

What is left over (1) in a division problem. Example: 13 divided by 2 = 6 r1

###
dividend

A number (54) that is divided by another. Example: 54 divided by 6 = 9

###
divsor

The number (6) that is divided into another. Example: 54 divided by 6 = 9

###
symmetry

When a shape can be divided in equal halves that reflect each other. Ex: when you can fold a shape in half and they exactly mirror eachother.

###
circle

A set of points on a plane that are equal distance from a center point.

###
circumference

The perimeter of a circle. Circumference = 2 pi(3.14) radius = pi(3.14) x diameter

###
diameter

The distance from a point on the circle through the center point to the opposite point on the other side.

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radius

The distance from a point on the circle to the center point.

###
cone

a pyramid with a circular cross section.

###
consecutive numbers

Numbers that come immediately after a given number.

###
cube

Six square faces that meet at right angles and has eight vertices and 12 edges.

###
cylinder

A prism (3-D) shape with round edges and 2 flat parellel circular bases. Example: a soup can.

###
decimal point

The symbol used to separate the whole number part from the fractional part of a number.

###
equal

Having the same value as another.

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greatest common factor (GCF)

The highest valued factor that numbers have in common.

###
inequality

Not being equal.

###
least common multiple

The lowest multiple that numbers have in common.

###
lowest terms

A fraction that has had all of the common factors canceled out.

###
ordered pair

A pair of elements x and y from a set, written (x,y), where x is the first and y is the second.

###
estimate

To calculate something approximately.

###
place value

The value given to a digit by its location in a numeral.

###
proper fraction

A fraction that the numerator is less than the denominator.

###
improper fraction

A fraction that the numerator is equal or larger than the denominator.

###
Roman Numerals

Numeric symbols formed with the Roman letters I, V, X, L, C, D, and M.

###
rotation

To rotate an object.

###
symbol

Something that represents something else often defined in a key or legend.

###
Venn diagram

A diagram using circles of sets, with the position and overlap of the circles indicating the relationships between the sets.

###
width

The measurement from side to side.

###
height

The distance from the base of something to the top.

###
depth

The measure of how deep something is.

###
translation

Sliding an object in a constant direction. Translation = Slide

###
percent

A ratio that compares a number to 100. Ex: 43 out of 100 = 43%

###
ratio

Comparing two numbers using division. Ex: 43/100

###
multiple

A product of a whole # and another number. Ex. Count bys: 4, 8, 16

###
data

Information collected and organized to look at.

###
regrouping

Borrowing or adding to the next 10 column.

###
flip

A reflection of what it was.

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