irregular polygons
DESCRIPTION
irregular polygons. Polygons with sides of different lengths. inscribed polygon. A polygon, all of whose vertices are points on a circle or other figure. isosceles triangle. A triangle in which two of the three sides are the same length. juxtapose. 5n means 5 * n ab means a * b. - PowerPoint PPT PresentationTRANSCRIPT
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irregular polygons
Polygons with sides of different
lengths.
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inscribed polygon
A polygon, all of whose vertices are points on a circle or other
figure.
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isosceles triangle
A triangle in which two of the three sides are
the same length.
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juxtapose
To place side by side in an expression to indicate multiplication.
5n means 5 * n
ab means a * b
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key sequence
A set of instructions for performing a particular calculation or function with a calculator.
14 [+] 37 [=] 51
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kilogram (kg)
Measures the unit of
mass.
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kilometer (km)
A unit equal to 1,000 meters.
1 kilometer is equal to 11 football fields
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kite
A quadrilateral with exactly two pairs of adjacent congruent sides.
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kite
A quadrilateral with two pairs of
adjacent sides that are the same
length.
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label
Descriptive word or phrase used to put numbers in
context.
24 children27 ducks
30 cents
3 o’clock
1 kg
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landmark
Numbers that are familiar and can be used to solve other
unfamiliar problems.
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landmark
A measure of data.
medianmode
maximumminimum
range
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least common
denominator
The least common multiple of the
denominators of every fraction in
given collection of fractions.
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least common multiple
The smallest that is a multiple of two or more
numbers.
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leg of a right
triangle
A side of a right triangle that is
not the hypotenuse.
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length
The longer side of a rectangle
or a rectangular
object.
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line
A straight path that extends infinitely in
opposite directions.
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line graph(broken-line
graph)
A graph in which points are
connected by a line or line segment to
represent data.
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line of
reflection (mirror line)
A line that divides a figure into tow halves that re mirror
images.
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line of symmetry
A line that divides a figure into two halves that are mirror
images.
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line of symmetry
A line through a symmetric figure. Each
point is one of the halves of the figure is
the same distance from this line as the
corresponding point in the other half.
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line symmetry
A figure has line symmetry if a line can be drawn through the figure that divides into two parts so that both
parts look exactly alike, but facing in opposite
directions.
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line plot
A sketch of data in which checkmarks, X’s
or stick-on notes above a number line
show the frequency of each value.
Nu
mb
er
of
child
ren
0 1 2 3 4 5X X X X X
X X X X X
X X
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line segment
A straight path joining two
points called endpoints of the
line segment.
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liter (L)
A unit of capacity equal to 1,000
milliliters. A liter is larger than a
quart.
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long
The base-10 block
consisting of 10 cm cubes.
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map legend
A diagram that explains the
symbols, markings and colors on a
map. Also called a map key.
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map scale
A rate that compares the
distance between two locations on a
map with the actual distance between
them.
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Math Boxes
Review problems and practice
skills.
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Math Journal
Student books used to practice and learn
skills.
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Math Message
Actives to start at the beginning of the math lesson.
1.1
Math Message 1.1 We are going to mark school days on a number line.Where would you mark today on the number line?
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mathematics
A study of relationships among numbers, shapes, systems, and patterns. It is used to count, measure
things, to discover similarities and
differences between them, to solve problems, and to learn about and organize
the world.
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maximum
The largest amount; the
greatest number in a set of data.
{3, 2, 8, 1, 9, 2} is 9
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measurement unit
The reference unit used when measuring
length, weight, capacity, time or
temperature.
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mean
A typical or middle value for
a set of numbers. It is the average.
2, 4, 5, 9, 10 = 3030 ÷ 5 = 6
The mean is 6
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median
The middle value in a set of data
when the data is listed in order.
2, 35, 65, 77, 80, 100, 205
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memory
Mechanical or electronic storage of
information for later recall.
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memory keys
Keys to manage a
calculator’s memory.
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memory key
The [M+], [M-], and [MRC] calculator keys. The [M+] key is
used to add a number to the number stored in the
calculator's memory; the [M-] key is used to subtract a
number from the number in memory. The [MRC] key,
pressed once, displays the number currently stored in memory; when the key is
pressed twice, the calculator's memory is cleared.
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mental arithmeti
c
Math done in their own
head.
2 + 3 = 5 2X3=6
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Mental Math and Reflexes
Oral lessons to strength children's
number sense and to review and advance
essential basic skills.
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meridian bar
A device on a globe that
shows degrees north and south of the equator.
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meter (m)
Measurement of length.
10 decimeters 100 centimeters1000 millimeters.
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metric system
Measurement based on base-ten system.
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metric system
A measurement system based on
the base 10 numeration system and used in most countries of the
world.
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middle value
The number in the middle when a set
of data is organized in
sequential order.
2, 35, 65, 77, 80, 100, 205
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midpoint
A point halfway
between two points.
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mile (mi)
Unit of length. 5,280 feet
1,760 yards1,509 meters
1 mile = 22 football fields
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milliliter (mL)
Metric unit of capacity.
1/1000 of a liter.
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millimeter (mm)
Metric unit of length. 1/10 of a centimeter.
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minimum
The smallest number in a
set.
{3, 2, 8, 1, 9, 2} is 1
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minuend
The number you start with
when you subtract.
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mixed number
A number that has a whole
number part and a fraction part.
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mode
The value that occurs most often in a set
of data.
3,4,4,4,5,5,6
mode
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multiples
Repeated groups of the same amount.
5’s5, 10, 15, 20 10’s
30, 40, 50, 60
25’s75, 100, 125
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multiplication
The operation used to find the total number in several equal
groups.
7 X 2 = 14
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multiplication fact
The product of two 1-
digit numbers.
2 x 3 = 6
4 x 0 = 0
9 x 3 = 27
8 x 8 = 64
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multiplicative inverses
Two numbers whose products is 1.
Multiplicative inverses are also called
reciprocals of each other.
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multiplications/division diagrams
The diagram has a number of groups, a
number in each group and a total
number.
4 x 3 = 12
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name-collection box
A boxlike diagram tagged with a given number and used for
writing the names for that number.
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negative number
A number less than 0;a number to the left of the 0 on a
horizontal number line.
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negative rational numbers
A number less than 0 that can be written as
a fraction or terminating or
repeating decimal.
-4-0.333…
-4/5
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n-gon
All other polygons can be called n-gons. You can
think of n-gons as meaning "any" number of sides, or whatever number of sides your current polygon has.
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net score
The final score of a turn or game after
any operations have been done.
In the game of Factor Captor, your first move is 29, your opponent's move is 1. You get your net score, 28, by subtracting 1 from 29.
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nonagon
A polygon that has nine sides and nine angles, more properly
(but less often!) called an enneagon.
A regular nonagon has nine equal sides and nine equal
angles.
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number family
A triplet of numbers with two addends and their sum or two factors and their products.
3 x 5 = 155 x 3 = 1515 ÷ 3 = 515 ÷ 5 = 3
3 + 5 = 85 + 3 = 88 - 3 = 58 - 5 = 3
8
3 5+,-
15
5 3x,÷
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number-grid
A table with consecutive
numbers arranged in rows
of ten.
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number-grid puzzle
A part of the number grid with numbers missing.
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number line
A line on which points
correspond to numbers in
order.
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number model
A number sentence that
models or fits a situation.
Sara has three round blocks And 2 square blocks. How many blocks in all?
3+2=5 blocks
number model
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number model
A number sentence that shows how the
parts of a number story are related.
Sara has three round blocks And 2 square blocks. How many blocks in all?
3+2=5 blocks
number model
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number scroll
Number-grid pages taped
together.
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number scroll
Multiple number-grid pages taped
together.
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number sequence
A list of numbers often generated by
some rule.
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number sentence
A sentence that is made up of
numerals and a relation symbol
(=,<,>)
2 + 3 = 5
894 < 1234
23 X 2 > 20
(10 - 4) X 5 = 30
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number story
A story that can be solved using one or more math operations.
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numerator
The number written above the line in a
fraction.
14
numerator
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obtuse angle
An angle greater than 90 degrees
and less than 180 degrees.
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octagon
An 8-sided polygon.
1 2
3
45
6
7
8
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odd number
A number that can not be
divided by 2. It has
1, 3, 5, 7, or 9 in the ones
place.
0 ^ 2 ^ 4 ^ 6 ^ 8 ^ 10^121 3 5 7 9 11
odd numbers
even numbers
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ONE
A way of showing the unit whole in part-whole fractions.
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1-facts
The sum of two 1-digit numbers where one of the numbers
is one.
3 + 1 9 + 1
0 + 1
4 + 1
2 + 1
1 + 1
7 + 1
6 + 1
5 + 1
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operation
An action preformed on one or two numbers
producing a single number result.
2 + 5 = 7
2 X 1 = 229 – 8 = 11
12 ÷ 2 = 6
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operation
Addition, subtraction, multiplication, division, raising to a power, and
taking a root are mathematical operations.
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opposite of a number
A number that is the same distance from zero
on the number line as the given number but
on the opposite side of the zero.
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ordered number
pair
Two numbers in specific order used to locate a point on a coordinate grid.
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orders of magnitud
e
Powers of ten.
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orders of operation
Rules that tell the order in which
operations should be done.
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ordinal numbers
A number used to express position
or order in a series.
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origin
The point where the x-axis and y-axis
intersect on a coordinate grid.
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ounce (oz)
A standard unit of weight equal
to 1/16 of a pound.
10 pennies = 1 oz
160 pennies = 1 pound
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outcome
A possible result of a
random process.
Head and tails are two outcomes from flipping a coin.
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pan balance
A device used to weigh
objects or compare weight.
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parabola
The curve formed by the surface of a right
circular cone when it is sliced by a plane that is parallel to a side of the
one.
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parabola
A parabola can also be described as the curve from a line and a point that is not on the line.
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parallel
Lines, rays, line segments, or planes
that are equal distance at all
points, no matter how far; never
meeting.
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parallelogram
A quadrilateral that has two pairs of
parallel sides and opposite sides that
are congruent.
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part-and-total
diagram
A diagram used with problems in with two or more
quantities are combined to from a
total quantity.
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part-to-part ratio
A ration that compares a part of the whole to another part of the
whole.
Part to part compares the red circles to the yellow circles. Part to part ratio is 2:5
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part-to-part whole
ratio
A ratio that compares a part of the whole to the
whole.
Part to total compares the red circles to the total amount of circles, 2:7 or you can compare the yellow circles to the total
amount of circles, 5:7