Math Flashcards

Front 1

Null or Empty Set

Back 1

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 ∅

Front 2

Double

Back 2

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.

Front 3

Triple

Back 3

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.

Front 4

Quadruple

Back 4

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.

Front 5

Transitive Property

Back 5

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.

Front 6

Reflexive Property

Back 6

Anything that equals itself

3 = 3

X = X

3+X = 3 + X

Front 7

Square Unit

Back 7

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

Front 8

Cubic Unit

Back 8

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

Front 9

Polygon

Back 9

Any 2-D (2 dimensional) shape that has straight sides and no open spaces.

Polygon Triangle...Square...many more

Not Polygon-Circle (rounded)

Not Polygon-Shapes that are not closed off

Front 10

Triangle

Back 10

Polygon with 3 sides

Front 11

Quadrilateral

Back 11

Polygon with 4 sides

Front 12

Pentagon

Back 12

Polygon with 5 sides

Front 13

Hexagon

Back 13

Polygon with 6 sides

Front 14

Heptagon

Back 14

Polygon with 7 sides

Front 15

Octagon

Back 15

Polygon with 8 sides

Front 16

Nonagon

Back 16

Polygon with 9 sides

Front 17

Decagon

Back 17

Polygon with 10 sides

Front 18

Inverse Operations

Back 18

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

Front 19

Linear Relationship

Back 19

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

Front 20

Positive Linear Relationship

Back 20

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

Front 21

Negative Linear Relationship

Back 21

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

Front 22

Strong Linear Relationship

Back 22

Points are close together on a graph.

Front 23

Weak Linear Relationship

Back 23

Points are spread out of a graph.

Front 24

No Linear Relationship

Back 24

No pattern is found in the points on the graph.

Front 25

Positive/Strong Linear Relationship

Back 25

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

Front 26

Positive/Weak Linear Relationship

Back 26

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

Front 27

Negative/Strong Linear Relationship

Back 27

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

Front 28

Negative/Weak Linear Relationship

Back 28

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

Front 29

Congruent

Back 29

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

Front 30

Inequality Symbols

Back 30

≥ Greater than or equal to

≤Less than or equal to

≠ NOT equal to

Front 31

Outlier

Back 31

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

Front 32

Meter Measurement Benchmarks

Back 32

Meter- Metric Unit for Measurement

Liter- Metric Unit for Liquid Measurements

Gram- Metric Unit for Weight/Mass

Front 33

Rational Numbers

Back 33

Numbers or Number Phrases that come out evenly

6/3 = 2

Square Root 16=4

5

Front 34

Irrational Numbers

Back 34

Numbers or number phrases that don't come out evenly.

1/3= .33333333333333

Square Root 15= 3.9

Front 35

Century

Back 35

100 years

Front 36

Decade

Back 36

10 years

Front 37

Midpoint

Back 37

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)

Front 38

Repeating Decimal Bar

Back 38

.3333333 = __
.3

.453453453453 = ____
.453

Front 39

Origin

Back 39

The middle of a coordinate plane or grid graph

Represented by the point (0,0)

Front 40

Annual

Back 40

Happening once a year

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

Front 41

Chord

Back 41

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

Front 42

Radius

Back 42

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

Front 43

Diameter

Back 43

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

Front 44

Circumference

Back 44

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

Front 45

Parallelogram

Back 45

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

Front 46

Perpendicular

Back 46

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

Front 47

Quadrilateral Angles

Back 47

Angles add up to 360 degrees for ANY quadrilateral

Front 48

Mean OR Average

Back 48

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

Front 49

Median

Back 49

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

Front 50

Mode

Back 50

The number that occurs the most

Front 51

Range

Back 51

The highest number minus the lowest number

Front 52

Upper Quartile

Back 52

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

Front 53

Lower Quartile

Back 53

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

Front 54

Squared

Back 54

Something to the 2nd Power

3 squared = 3 * 3 = 9

Front 55

Cubed

Back 55

Something to the 3rd Power

4 squared = 4 * 4 * 4 = 64

Front 56

Parallel

Back 56

To lines that will not touch

The symbol is | |

Front 57

Perpendicular

Back 57

When two lines come together at a right angle (90 degrees or square angle)

The symbol for perpendicular is ⊥

Front 58

Probability

Back 58

The chance of something happening. The symbol is...

P( )

Front 59

Ways to name an angle

Back 59

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

Front 60

Vertex

Back 60

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

Front 61

Line

Back 61

Goes on forever in both directions

↔

Front 62

Segment

Back 62

Stops at both ends

−

Front 63

Ray

Back 63

Stops in one direction but keeps going in the other

➞

Front 64

Isosceles Triangle

Back 64

A triangle with 2 equal sides

Front 65

Equilateral Triangle

Back 65

A triangle with all equal sides

Front 66

Scalene Triangle

Back 66

A triangle with all side lengths being different

Front 67

Right Triangle

Back 67

A triangle with 1 right angle

Front 68

Acute Triangle

Back 68

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

Front 69

Obtuse Triangle

Back 69

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