equation a statement that two mathematical expressions are equal
TRANSCRIPT
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Equation
A statement that two mathematical
expressions are equal
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Number Sentence
An equation or inequality with numbers
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Addend
Any number that is being added
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Combination
A group of items. Placing these items in a different order does not create a
new combination.
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Equivalent
Having the same value
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Expression
A variable, or any combination of numbers,
variables, and symbols that represents a mathematical
relationship (e.g.,24 x 2+5 or 4a-9).
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Fact Family
A set of related addition and subtraction, or multiplication and division equations using
the same numbers (e.g., 6+9=15, 15-9=6,
9+6=15, 15-6=9)
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Function
A relation in which every input value has a unique
output value
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Inequality
A mathematical sentence that contains a symbol that shows
the terms on either side of the symbol are unequal (e.g.,
3 + 4 > 6)
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Composite Number
A whole number having more than two factors
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Whole Number
Any of the numbers 0,1,2,3,4,5,….(and so on)
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Edge
The line segment where two faces of a
solid figure meet
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Factor
A whole number that divides evenly into
another whole number.
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Hexagon
A polygon with 6 sides
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Line
A straight path extending in both directions with no
endpoints
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Line of Symmetry
A line that divides a figure into two halves that are mirror images
of each other
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Mean
The number found by dividing the sum of a set of numbers by the number of addends
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Median
The middle number in an ordered set of data, or the average of the two middle numbers when the set has
two middle numbers
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Cube
A rectangular solid having six congruent
square faces
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Acute Angle
An angle with a measure less than 90°
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Analog Time
Time displayed on a timepiece having hour
and minute hands
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Composite Number
A whole number having more than two
factors
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Congruent
Having the same size and shape
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Cylinder
A three-dimensional figure with two
circular bases, which are parallel and
congruent
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Edge
The line segment where two faces of a
solid figure meet
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Equivalent
Having the same value
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Expression
A variable, or any combination of numbers,
variables, and symbols that represents a mathematical
relationship
(i.e. 24 x 2+5 or 4a-9)
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Face
A plane that serves as one side of a solid
figure
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Addend
Any number that is being added
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Combination
A group of items. Placing these items in a different
order does not create a new combination.
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Area
The measure, in square units, of the
inside of a plane figure
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Array
The rectangular arrangement of
objects in equal rows or columns
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Cone
A solid figure that has a circular base and
one vortex
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Line Segment
A part of a line with two endpoints
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Mode
The number(s) that occurs most often in a
set of data
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Multiples
The product of a given whole number and another
whole number
(i.e. multiples of 4 are 4,8,12,16…)
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Obtuse Angle
An angle with a measure more than
90°
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Octagon
A polygon with 8 sides
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Ordered PairA pair of numbers used to locate a
point on a coordinate grid. The first number tells how far to move
horizontally, and the second number tells how far to move vertically
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Parallel Lines
Lines that never intersect and are always the same
distance apart
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Parallelogram
A quadrilateral whose opposite sides are parallel
and congruent
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Pentagon
A polygon with 5 sides
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Perimeter
The distance around a figure
4in 4in
5in
5in
4+5+4+5 = 18in
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Perpendicular Lines
Two lines, segment, or rays that intersect to form right
angles
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Pictograph
A graph that uses pictures to show and compare information
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Pyramid
A solid figure with a polygon base and triangular sides that meet at a single point (vertex)
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Quadrilateral
A polygon with 4 sides
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Ray
A part of a line that has one endpoint and continues
without end in one direction
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Rectangular Prism
A solid figure in which all six faces are rectangles
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Reflection (flip)
A transformation that produces the mirror
image of a figure
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Vertex
A point where lines, rays, sides of a polygon, or edges
of a polyhedron meet (corner)
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Volume
The amount of space (in cubic units) that a solid figure can hold
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Chord
A line segment whose endpoints are on a circle
A B
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Circumference
The distance around a circle
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Composite Number
A whole number having more than two
factors
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Diameter
A line segment that has endpoints on a circle that passes through the center
of the circle
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Expanded Notation
A way to write numbers that shows the value of each
digit(i.e. 4372 = 4000+300+70+2)
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Greatest Common Factor (GCF)
The largest factor that 2 or more numbers have in
common
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Heptagon
A polygon with 7 sides
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Histogram
A bar graph in which the labels for the bars are numerical
intervals
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Hypotenuse
The longest side of a right triangle (which is also the side
opposite the right angle)
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Least Common Denominator (LCD)
The least common multiple of the denominators in two or
more fractions
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Least Common Multiple (LCM)
The smallest number, other than zero, that is a common
multiple of two or more numbers
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Leg (of a right triangle)
Either of the two sides that form the right angle in a right
triangle
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Line Plot
A graph showing the frequency of data on a number line
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Nonagon
A polygon with 9 sides
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Plane
A flat surface the extends infinitely in all directions
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Prime Number
A Whole number that has exactly two factors, 1 and
itself
(i.e. 3,5,7,13,23,97)
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Quadrants
The four regions of a coordinate plane that are separated by axis
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Radius
A line segment that has one endpoint on a circle and the
other endpoint at the center of the circle
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Range
The difference between the greatest and least numbers in
a set of data
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Rate
A ratio that compares two quantities having different units
(i.e. 95 miles in 2 hours)
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Regular Polygon
A polygon that has all sides congruent and all angles
congruent
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Repeating Decimal
A decimal that has a repeating sequence of numbers after the
decimal point
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Similar Polygons
Polygons that have the same shape, but not necessarily the
same size. Corresponding sides of similar polygons are
proportional.
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Straight Angle
An angle with a measure of 180°
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Terminating Decimal
A decimal that contains a finite number of digits
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Transformation
The moving of a figure by a translation (slide), rotation (turn), or reflection (flip)
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Unit Price
The price of a single item or amount
(i.e. $1.50 per pound)
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Unit Rate
A rate with the second term being one unit
(i.e. 50mi/gal, 4.5km/sec)
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Venn Diagram
A diagram that shows relationships among sets of
objects via overlapping circles
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X-Axis
The horizontal number line on a coordinate plane
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Y-Axis
The vertical number line on a coordinate plane
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Rhombus
A parallelogram of 4 equal sides
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Right Angle
An angle that measures exactly 90°
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Right Triangle
A triangle that has a 90° angle
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Rotation (turn)
A movement of a figure that turns a figure around a fixed
point
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Sphere
A solid figure that has all point the same distance from the center
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Tally Chart
A table that uses tally marks to record data
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Translation (slide)
A movement of a figure to a new position without turning
or flipping it
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Trapezoid
A quadrilateral with exactly one pair of parallel sides