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MATH VOCABULARY Intermediate

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Acute Angle An angle that measures less than a right angle (90°).angleright angle

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addend Any of the numbers that are added Example: = 5 The addends are 2 and 3.

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A.M. The time between midnight and noon

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Angle A figure formed by two rays that meet at a common endpointrays

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Area The number of square units needed to cover a given surface.square

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Array An arrangement that shows objects in rows and columns

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Bar Graph A way to show information that uses bars to stand for data

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Benchmark Numbers like 10, 25, 50, or 100 that are used to help make estimatesestimates

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Calendar A table that shows the days, weeks, and months of a year in order

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Capacity The amount a container can hold when filled

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Cell Any single box in a table

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Circle Graph A graph in the shape of a circle that shows data as a whole made up of different partscircle data

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Closed Figures A shape that begins and ends at the same point point

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Cone A solid, pointed figure that has a flat, round basesolid

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Congruent Figures that have the same size and shape These triangles are congruent.

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Cube A solid figure with six congruent square facessolid figurecongruentsquare faces

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Cumulative Frequency A column in a table that keeps a running total in a frequency tablefrequency table

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Cup A customary unit used to measure capacitycustomarycapacity 2 cups = 1 pint

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Cylinder A solid figure that is shaped like a cansolid figure

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Decimal A number that uses place value and a decimal point to show values less than one, such as tenths and hundredthsplace value decimal pointtenthshundredths 3.47

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Decimal point A period used in decimal numbers to separate the whole number part from the decimal partdecimal

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Degree A unit of measure used to measure parts of a circle. There are 360° in a circle.

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Degree Celsius A standard unit for measuring temperature in the metric system metric system

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Degrees Fahrenheit A standard unit for measuring temperature in the customary system customary system

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Denominator The number below the bar in a fraction. It tells the total number of equal parts.fraction

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Diameter A line segment that passes through the center of a circle and has its endpoints on the circleline segment

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Difference The answer in a subtraction problem = 3 3 is the difference.

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Dividend The number that is being divided in a division problem division 35 ÷ 5 = 7 The dividend is 35.

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Divisor The number that divides the dividenddividesdividend 18 ÷ 3 = 6 The divisor is 3.

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Double bar graph A graph using bars to compare similar kinds of databars

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Elapsed time The time that passes from the start of an activity to the end of that activity The elapsed time is one hour.

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Equally likely When the outcomes of an experiment have the same chance of happeningexperiment You are equally likely to roll 1, 2, 3, 4, 5, or 6.

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Equilateral triangle A triangle with all sides congruenttrianglecongruent

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Equivalent decimals Two or more decimals that name the same amountdecimals 0.3 and 0.30 name the same amount.

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Equivalent fractions Two or more fractions that name the same amountfractions

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Expanded form A way to write numbers by showing the value of each digitdigit 635 = ,479 = 1,

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Expression A part of a number sentence that combines numbers and operation signs (12 – 4) – 3

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Fact family A set of related addition and subtraction or multiplication and division number sentencesadditionsubtraction multiplicationdivision = = = = 4 or 3 X 6 = ÷ 6 = 3 6 X 3 = ÷ 3 = 6

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Factor A number that is multiplied by another number to find a product.multipliedproduct 4 4 X 7 = 28 X 7 28 The factors are 4 and 7.

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Factor tree A diagram that shows the prime factors of a composite numberprimefactors

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Fraction A number that names part of a whole or part of a group

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Frequency table A table that organizes the total for each category or group

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Gallon A customary unit used to measure capacitycustomarycapacity 4 quarts = 1 gallon

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Grouping property of addition The property which states that the way addends are grouped does not change the sumaddendssum (5 + 9) + 3 = 5 + (9 + 3) = = 17

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Grouping property of multiplication The property which states that the way factors are grouped does not change the product factors product (2 X 3) X 4 = 2 X (3 X 4) 6 X 4 = 2 X = 24

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Hexagon A polygon with 6 sides and 6 anglespolygonangles

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Horizontal The direction from left to right

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Hundredth One of one hundred equal parts

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Impossible Something that will never happen Example: A dinosaur will walk into your classroom today.

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Intersecting lines Two or more lines that cross at exactly one pointlines point The lines intersect at point B

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Interval The distance between the numbers on the scale of a graph. scale

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Inverse operations Opposite operations that undo each other; Addition and subtraction are inverse operations, and so are multiplication and division. Additionsubtractionmultiplication division = 9, so 9 – 4 = 5 3 X 4 = 12, so 12 ÷ 4 = 3

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Isosceles triangle A triangle with two congruent sidestrianglecongruent

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Line A straight path extending in both directions with no endpoints

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Line graph A graph that uses line segments to show how data change over a period of timeline segmentsdata

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Line plot A diagram that shows the frequency of data as they are collectedfrequencydata

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Line segment Part of a line, with two endpoints

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Line symmetry A figure has line symmetry when it can be folded about a line so that its two parts are identical.

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Linear units An inch is about the length of your thumb from the first knuckle to the tip.inch A foot is about the height of a cat. foot A yard is about the length of a baseball bat.yard A mile is about the distance you can walk in 20 minutes. mile

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Mean Step 1 Use unit cubes. Make 6 stacks of cubes to model the number of tickets sold each day. Step 2 Arrange the stacks in order from the shortest to the tallest. Step 3 To find the mean, move the cubes so the 6 stacks are equal in height. The number of cubes in each stack is the mean.

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median The middle number in an ordered series of numbers The median of 1, 3, 4, 6, and 7 is 4.

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mode The number that occurs most often in a list of datadata The mode of 1, 3, 4, 4, and 6 is 4.

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Multiple

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Negative numbers Numbers less than zero

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Net A two-dimensional pattern of a three- dimensional solidtwo-dimensionalthree- dimensional

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Nominal A number that names things

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Numeration system A way to count and name numbers

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Numerator The number above the bar in a fraction. It tells how many of the equal parts of the whole or group are being considered.fraction

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Obtuse angle An angle whose measure is greater than 90° and less than 180°angle

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octagon A polygon with 8 sides and 8 anglespolygonangles

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One-dimensional A measure in only one direction, such as length

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Open figure A figure that does not begin and end at the same point

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Opposites 1 and –1 3 and –3 7 and –7

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Order property of multiplication The property which states that when the order of the two factors is changed, the product is the samefactorsproduct 4 X 5 = 5 X 4 20 = 20

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Ordered Pair A pair of numbers used to locate a point on a grid. point (1,2) represents 1 space to the right of zero and 2 spaces up.

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Ordinal A number that tells position or order Jon won first place. Jean is 4th in line.

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Parallel lines LinesLines that never cross and are always the same distance apart

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Parallelogram A quadrilateral with 2 pairs of parallel sides, 2 pairs of equal angles, and 2 pairs of equal sidesquadrilateralparallelangles

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Pentagon A polygon with 5 sides and 5 anglespolygonangles

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Perimeter The distance around a figure 2 cm + 3 cm + 3 cm = 8 cm The perimeter of this figure is 8 centimeters.

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Period Each group of three digits in a numberdigits

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Perpendicular lines Two lines that intersect to form four right angleslinesintersectright angles

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Pictograph A graph that uses pictures to show and compare information

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Pint A customary unit used to measure capacitycustomarycapacity 2 cups = 1 pint

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Place value The system in which the position of a digit in a number determines its value; see decimal number system decimal number system

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Plane A flat surface that extends without end in all directions Planes are named by three points in the plane.points

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Plane Figure A figure that lies in one planeplane

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P.M. The time between noon and midnight

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Point symmetry When a figure can be turned about a central point and still look the same in at least two positionspoint

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Probability The chance that a given event will occurevent Probability of red = 1 4

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Quart A customary unit used to measure capacitycustomarycapacity 2 pints = 1 quart

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Quotient The answer in a division problemdivision 35 ÷ 5 = 7 The quotient is 7.

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Radius A line segment with one endpoint at the center of a circle and the other endpoint on the circleline segment

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Range The difference between the greatest and the least numbers in a set of numbersdifference range: 6 – 0 = 6

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Ray A part of a line that begins at one endpoint and extends forever in only one directionline

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Rectangle A polygon with 4 sides and 4 right anglespolygonright angles

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Rectangular prism A solid figure in which all six faces are rectanglessolid figurefaces rectangles

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Reflection (flip) The result of a figure flipped over a line

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Remainder The amount left over when you find a quotient quotient

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Rhombus A parallelogram whose four sides are congruent and whose opposite angles are congruentparallelogram congruentangles

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Right angle An angle that forms a square corner and measures 90°angle

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Rotation (turn) The action of turning a figure around a point or a vertexpointvertex

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scale A series of numbers placed at fixed distances on a graph to help label the graph

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Scalene triangle A triangle in which each side has a different lengthtriangle

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Schedule A table that lists activities and the times they happen FLIGHTS FROM MIAMI TO NEW YORK CITY Each flight lasts about 2 hours and 45 minutes. AirlineDeparture Time Airline A9:10 A.M. Airline B10:15 A.M. Airline C12:50 P.M. Airline D 1:20 P.M.

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Similar figures Figures that have the same shape but may have different sizes

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Simplest form When a fraction can be modeled with the largest fraction bar possiblefraction

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Solid figures sphere cube cylinder rectangular prism cone square pyramid

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square A polygon with 4 equal sides and 4 right anglespolygonright angles

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Square pyramid A solid figure with a base that is a square and four faces that are trianglessolid figuresquarefacestriangles

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Tally table A way to organize data that uses tally marks to show how often something happensdatatally marks

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tangram A puzzle consisting of seven polygon- shaped pieces that can be rearranged to make various figures or shapespolygon

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tenth One of ten equal parts

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tessellation A repeating pattern of closed figures that covers a surface with no gaps and no overlapsclosed figures

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Three-dimensional A measure in three directions, such as length, width, and height

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transformation The movement of a figure, either a translation, rotation, or reflection translationrotationreflection

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Translation (slide) The action of sliding a figure in any direction

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trapezoid A quadrilateral with only one pair of parallel sidesquadrilateralparallel

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Tree diagram An organized list that shows all possible outcomes of an eventevent So, there are 6 possible outcomes.

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triangle A polygon with 3 sides and 3 anglespolygonangles

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24-hour clock A clock that does not use A.M. or P.M.A.M.P.M.

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Two-dimensional A measure in two directions, such as length and width

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Venn diagram A diagram that uses circles to show relationships among sets of things

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vertex The point at which two rays of an angle or two or more line segments meet in a plane figure, or where three or more sides meet in a solid figurepointraysangleline segmentsplane figuresolid figure

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vertical The direction from top to bottom

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volume The measure of the space a solid figure occupies

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x-coordinate The first number in an ordered pairordered pair (4, 6) (2, 5)

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y-coordinate (3, 7) (5, 9) The second number in an ordered pairordered pair

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Zero property for multiplication The property which states that the product of zero and any number is zeroproduct 13 X 0 = 0 0 X 7 = 0

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