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69 Cards in this Set
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Null or Empty Set

When there is nothing that fits what is asked for...
Example: (2,4,6,8,10) List all the odd numbers The answer would be a Null or empty set because there are no odd numbers The symbol for an empty or null set is a circle with a slash through it ∅ 
Double

Twice as much
Times 2 Multiply by 2 If I have 2 dollars and I double my amount, I now have 4 dollars. If I have double the amount of video games as Franks and I have 10 video games, he has 5 video games. 
Triple

3 times as much
Times 3 Multiply by 3 If I have triple the amount of money that Frank has, and Frank has 5 dollars, I have 15 dollars If Jim has 30 balloons and that is triple of what I have, then I have 10 balloons. 
Quadruple

4 times as much
Times 4 Multiply by 4 I have 3 apples...if I quadruple my number of apples, I now have 12 If Grundy Center has quadruple the number of fire trucks when compared to Gladbrook, and Grundy Center has 4 fire trucks, then Gladbrook has 1 fire truck. 
Transitive Property

If A=B and B=C then A has to equal C
If Frank is the same height as Jim, and Jim is the same height as Pedro, then even though they aren't standing side by side, Frank is the same height as Pedro. If If Ryne Sandberg and Andre Dawson's baseball card are worth the same, and Andre Dawson and Ron Santo's baseball cards are worth the same, then Ryne Sandberg and Ron Santo's baseball cards are worth the same. 
Reflexive Property

Anything that equals itself
3 = 3 X = X 3+X = 3 + X 
Square Unit

A square where all of the sides are the same unit of measure.
A square inch is a square shape with all its sides being 1 inch long A square meter is a square with all its sides being 1 meter long A square mile is a square shape with all sides being a mile long 
Cubic Unit

A cube shape with all of the edges being the size of the unit
A cubic inch is a cube shape in which every edge is an inch A cubic meter is a cube shape in which every edge is a meter A cubic yard is a cube shape where every edge is a yard 
Polygon

Any 2D (2 dimensional) shape that has straight sides and no open spaces.
Polygon Triangle...Square...many more Not PolygonCircle (rounded) Not PolygonShapes that are not closed off 
Triangle

Polygon with 3 sides

Quadrilateral

Polygon with 4 sides

Pentagon

Polygon with 5 sides

Hexagon

Polygon with 6 sides

Heptagon

Polygon with 7 sides

Octagon

Polygon with 8 sides

Nonagon

Polygon with 9 sides

Decagon

Polygon with 10 sides

Inverse Operations

Doing the opposite operation with the same number amount
Often used when solving algebra problems The inverse operation of adding 5 is subtracting 5 The inverse operation of dividing by 7 is multiplying by 7 The inverse operation of subtracting 2 is adding 2 The inverse operation of multiplying by 10 is dividing by 10 
Linear Relationship

Pattern of points on a graph that can either be positive, negative, strong, weak, no relationship, or a combination of +/ and strong/weak.

Positive Linear Relationship

Points go from the lower left to the upper right of the graph.

Negative Linear Relationship

Points go from the upper left to the lower right of the graph.

Strong Linear Relationship

Points are close together on a graph.

Weak Linear Relationship

Points are spread out of a graph.

No Linear Relationship

No pattern is found in the points on the graph.

Positive/Strong Linear Relationship

The points are close together flowing from the bottom left to the top right of the graph.

Positive/Weak Linear Relationship

The points are spread out and flow from the bottom left to the top right of the graph.

Negative/Strong Linear Relationship

The points are close together flowing from the top left to the bottom right of the graph.

Negative/Weak Linear Relationship

The points are spread out and flow from the top left to the bottom right of the graph.

Congruent

It means "the same"
Used when talking about two lines or two angles that are the same measurement These lines are congruent because they have the same measurements These angles are congruent because they are the same degrees 
Inequality Symbols

≥ Greater than or equal to
≤Less than or equal to ≠ NOT equal to 
Outlier

A piece of information on a graph, chart, or list that doesn't fit with the rest of the information
Examples: (1,3,2,4,3,2,23) 23 is outlier Basketball Team Heights 6 ' 7" 6' 5" 5' 6" 6' 4" 6' 6' 5' 6" is the outlier 
Meter Measurement Benchmarks

Meter Metric Unit for Measurement
Liter Metric Unit for Liquid Measurements Gram Metric Unit for Weight/Mass 
Rational Numbers

Numbers or Number Phrases that come out evenly
6/3 = 2 Square Root 16=4 5 
Irrational Numbers

Numbers or number phrases that don't come out evenly.
1/3= .33333333333333 Square Root 15= 3.9 
Century

100 years

Decade

10 years

Midpoint

A halfway point in the middle of a line.
If you are using coordinates, just draw the two points and connect them, then estimate where the middle would be. (3,4) and (10,5) If you draw this out and estimate, the midpoint of the lone would be around (6,4) or (6,5) 
Repeating Decimal Bar

.3333333 = __
.3 .453453453453 = ____ .453 
Origin

The middle of a coordinate plane or grid graph
Represented by the point (0,0) 
Annual

Happening once a year
Adding the prefix bi or semi as in biannual or semiannual means twice a year 
Chord

A line segment that goes from one point of a circle to another.

Radius

A segment that goes from the outside of a circle to the middle of the circle. The radius is HALF of the diameter.

Diameter

A line segment from one side of a circle to the other THROUGH THE MIDDLE. This is twice as long as the radius.

Circumference

The distance around the outside of a circle ALSO the perimeter of a circle.

Parallelogram

A quadrilateral with 2 pairs of parallel sides. Examples could include squares, rectangles, as well as the traditional parallelogram which is a slanted rectangle.

Perpendicular

Two lines that cross at a right angle (90 degrees). They make square corners.

Quadrilateral Angles

Angles add up to 360 degrees for ANY quadrilateral

Mean OR Average

Add all the numbers together and divide by how many numbers there are

Median

After putting the numbers in order, the median is the middle number. If there are two middle numbers, find the number that would be exactly in between the two middle numbers

Mode

The number that occurs the most

Range

The highest number minus the lowest number

Upper Quartile

The middle number between the middle number and the highest number when the numbers are put in order.

Lower Quartile

The middle number between the middle number and the lowest number when the numbers are put in order.

Squared

Something to the 2nd Power
3 squared = 3 * 3 = 9 
Cubed

Something to the 3rd Power
4 squared = 4 * 4 * 4 = 64 
Parallel

To lines that will not touch
The symbol is   
Perpendicular

When two lines come together at a right angle (90 degrees or square angle)
The symbol for perpendicular is ⊥ 
Probability

The chance of something happening. The symbol is...
P( ) 
Ways to name an angle

An angle can be named 3 different ways
An angle can be named by its vertex ≺B An angle can also be named with the other letters that make up the angle...as long as the vertex is in the middle ≺ABC OR ≺CBA 
Vertex

Where the two rays of angle come together or the point of an angle

Line

Goes on forever in both directions
↔ 
Segment

Stops at both ends
− 
Ray

Stops in one direction but keeps going in the other
➞ 
Isosceles Triangle

A triangle with 2 equal sides

Equilateral Triangle

A triangle with all equal sides

Scalene Triangle

A triangle with all side lengths being different

Right Triangle

A triangle with 1 right angle

Acute Triangle

A triangle with ALL angles being acute or less than 90 degrees

Obtuse Triangle

A triangle with 1 obtuse angle (more than 90 degrees)
