ELE 4050 Mitchell Spring 2012

1. 4th grade
Math Terms
A-Z
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By: Ms. Rebecca Morgan 1
2
4
ELE 4050
Spring 2012

2. A is for Angle
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• angle
• The union of two rays
1
2
with the same endpoint.
4
• The rays are the sides
and the common
endpoint is called the
vertex. There are many
types of angles.

3. A is for Acute Angle
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• acute angle
1
2
• An angle whose
measure is between 0°
and 90º.
• We like to think of
them as the "cute" tiny
angles.
4

4. A is for Addend
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• addend
• A number to be added.
1
2
4

5. B is for Bar Graph
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• bar graph
1
2
• A graph in which
information is
represented using bars
4
of various lengths to
show values of a
particular category.

6. C is for Circle Graph
0011 0010 1010 1101 0001 0100 1011
• circle graph
• A graph in which
1
2
information is
represented using a
circle that is cut into
4
sectors to show values
of a particular category.
Also called a pie graph.

7. C is for Common Denominator
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• Ex:
Given 1/2, 1/3, 1/4 one
• common denominator common denominator
would be 12,
1
2
because 2, 3, & 4 all
divide into 12 evenly.
• A multiple of all the 24, 36, 48 etc. would also
4
denominators in a be common denominators
problem. but 12 is used most often
because it is the smallest,
or "least common
denominator", and thus is
easier to work with.

8. C is for Congruent
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• congruent • Example:
1
2
• Equal • Congruent angles
means the same as
equal angles.
4
• Congruent figures
have the same shape
and size.

9. D is for Denominator
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• denominator
• The divisor, or bottom
number, in a fraction.
1
2
b in the fraction a/b.
• Remember that a fraction is a
division problem. The top
4
number, the numerator, is the
number being divided, the
fraction bar is the division • *If the numerator is greater than
the denominator, the fraction is > 1.
symbol, and the bottom **If the numerator is less than the
number, the denominator, is the denominator, the fraction is < 1.
number of equal parts that you
are dividing the top into.

10. D is for Dividend
0011 0010 1010 1101 0001 0100 1011
• dividend
1
2
• The number in a
quotient which is
being divided; a is the
4
dividend in a/b.

11. D is for Divisor
0011 0010 1010 1101 0001 0100 1011
• divisor
• The number by which
1
2
you divide in a quotient;
b is the divisor in a/b.
Also a number that
4
exactly divides into
another
number, referred to as a
factor.

12. E is for Equilateral Triangle
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• equilateral triangle
• A triangle in which all
1
2
4
the sides have the
same length.

13. F is for Fraction
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• fraction
1
2
• A number written in
the form a/b, where b
is non zero.
4

14. G is for Gallon
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• gallon (gal)
1
2
• A unit of capacity in
the U.S. system of
measurement equal to
4
4 quarts.

15. G is for Graph
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• graph
1
2
• A picture of numbers
on a number line or
coordinate system.
4

16. H is for Horizontal Line
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• horizontal line
• A horizontal line is one which runs
2
left-to-right across the page.
• In geometry, a horizontal line is
one which runs from left to right 1
4
across the page. It comes from the
word 'horizon', in the sense that
The horizon is horizontal.
horizontal lines are parallel to the
horizon.

17. I is for Isosceles Triangle
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• isosceles triangle
1
2
4
• A triangle with two
sides equal in length.

18. J is for Justification
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• justification
1
2
• A
definition, postulate, o
r theorem which
4
enables a conclusion
to be drawn.

19. K is for Kilo
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• Example :
• kilo
1
2
• 2 kilograms = 2000
• A prefix meaning grams
4
1000.
• 2 kilometers = 2000
meters

20. L is for Line Symmetry
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• line symmetry
1
2
• A figure is said to
posses line symmetry
if it can be reflected
4
onto of itself over a
given line.

21. M is for Mean
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• mean
• For example: To find the
2
mean, or average, of 10, 9,
1
• A number that describes a
8, and 5 this is what you set of other numbers. You
would do: get a mean, or average, as
it is commonly called, by
4
taking the sum of the
numbers being examined
and then dividing that sum
by how many numbers
were added.

22. M is for Mode
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• The mode of the
following data set is 6 :
• mode 15, 6, 2, 6, 42, 6.
• The number which
appears most often in a 1
• It is possible to have
more than one mode as
2
4
data set. in the set 1, 1, 3, 12, 4,
4. It is possible to have
no mode if no values
appear more than once
as in the set 1, 2, 3, 4.

23. N is for Numerator
0011 0010 1010 1101 0001 0100 1011
• numerator
• *If the numerator is greater than the
• a in the fraction a/b. denominator, the fraction is > 1.
Remember that a fraction is a
2
**If the numerator is less than the
division problem. The top
1
denominator, the fraction is < 1.
number, the numerator, is the
number being divided, the
fraction bar is the division
4
symbol, and the bottom
number, the denominator, is
the number of equal parts that
you are dividing the top into.

24. N is for Net
0011 0010 1010 1101 0001 0100 1011
• net
• A two-dimensional
figure that can be
folded on its segments 1
2
4
or curved on its
boundaries into a
three-dimensional
surface.

25. O is for Obtuse Angle
0011 0010 1010 1101 0001 0100 1011
• obtuse angle
1
2
• An angle whose measure
is between 90° and 180°.
Remember a 90° angle is
4
called a right angle not an
obtuse angle, and a 180°
angle is called a straight
angle not an obtuse angle.

26. P is for Parallel Lines
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• parallel lines
1
2
• Two lines in a plane
are parallel if they
have no points in
4
common or are
identical and they
never intersect.

27. P is for Place Value
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• place value
• numbers that each digit
1
2
stands for in a decimal.
In the illustration below, if
you think of the one's
place and the decimal
4
point as the center, the
names correspond on
either side. Remember, the
numbers to the right of the
decimal point always end
in "ths".

28. Q is for Quadrilateral
0011 0010 1010 1101 0001 0100 1011
1
2
• quadrilateral
4
• A four-sided polygon.

29. Q is for Quadrant
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• Quadrant
1
2
• One of the four parts into
which the coordinate
plane is divided by the x-
4
axis and y-axis. Quadrants
are labeled with Roman
Numerals as shown
below.

30. Q is for Quotient
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• Quotient
• The result of dividing
1
2
4
one number by
another

31. R is for Right Angles
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• right angle
1
2
• An angle whose
measure is 90°. A
right angle will always
4
be drawn with a small
square at its vertex.

32. S is for Scalene Triangle
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• scalene triangle
• A triangle with no two
1
2
4
sides of the same
length.

33. T is for Triangle
0011 0010 1010 1101 0001 0100 1011
1
2
• triangle
4
• A polygon with three
sides.

34. U is for “U.S System of Measurement”
12 inches =1 foot
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• U.S system of 36 Inches = 1 yard
measurement 5,280 feet = 1 mile
1
2
1 square mile = 640 acres
• A measurement system
in common use in the 8 ounces = 1 cup
United States
4
2 cups = 1 pint
today, based on inches
and pounds. Also called 2 pints = 1 quart
the customary system of 4 quarts = 1 gallon
measurement.
16 ounces = 1 pound
2,000 pounds = 1 ton

35. V is for Vertex
0011 0010 1010 1101 0001 0100 1011
• Vertex
1
2
• (plural vertices) The
point two sides of a
polygon have in
4
common. The point of
intersection of the
sides of an angle.

36. W is for Whole Number
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• whole number
1
2
4
• Any of the numbers 0, 1, 2, 3, ... .

37. X is for X-axis
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• x-axis
• The horizontal (left to
1
2
right) number line in a
coordinate graph. The
line in the coordinate
4
plane or in
space, usually
horizontal, containing
those points whose
second coordinates (and
third, in space) are 0.

38. X is for X-Coordinate
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• x-coordinate
1
2
• Ex: in the coordinate
• The first coordinate of pair
4
an ordered pair or an (3,-8), the three is the x-
ordered triple. coordinate.

39. Y is for Y-axis
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• y-axis
• The vertical (up and
1
2
down) number line in a
coordinate graph. The
line in the coordinate
4
plane, usually
vertical, or in
space, containing those
points whose first
coordinates (and
third, in space) are 0.

40. Y is for Y-Coordinates
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• Ex: in the coordinate
pair (3,-2), the negative
• y-coordinate
two is the y-coordinate.
• The second coordinate
1
2
4
of an ordered pair or
ordered triple

41. Z is for Zero Angle
0011 0010 1010 1101 0001 0100 1011
• zero angle
• An angle whose measure is zero.
1
2
• There is still a vertex.
4

42. Resources
0011 0010 1010 1101 0001 0100 1011
• http://www.themathlab.com/dictionary/awords/a
words.htm
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2
4