Math Vocabulary by Roanoke 5th graders

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Math Vocabularyby Roanoke 5th graders

• References
• http//www.hbschool.com/glossary/math2/index_temp.
  html

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90

• An angle that forms a square corner and measures
  90

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Acute Angle

• An acute angle is an angle that measures less
  then 90.

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270 degrees

• Three fourths turn

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angle

• A figure formed by two rays that meet at a common
  endpoint which is called a vertex.

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chord

• A line segment with end points on a circle.

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Circle

• A closed figure with all points on the figure the
  same distance from the center point.

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Circumference

• The distance around a circle

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Compassa tool used to construct circles
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Composite
4, 12, and 24

• A whole number that has more than two factors

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CongruentShapes

• To have the same size and shape.

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Absolute value

• The distance from a point on the number line to
  zero.

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Coordinates

• An ordered pair of
• Integers that names a point on a coordinate plane

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decimal

• A number that uses place value and a decimal
  point to show values less than one, such as tens
  and ones

3.14
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Denominator
The number below the bar in a fraction. It shows
the total number of equal parts.
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Diameter

• A line segment that passes through the middle of
  the circle and has its end points on the circle

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difference

• The answer to a subtraction problem

5-41
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Digit

• Any one of the ten symbols 0,1,2,3,4,5,6,7,8 or 9
  used to write numbers

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dividend

• The number that is being divided is the dividend.

35 5 7                 
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Divisor

• The number by which a dividend is divided in a
  division problem.

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Equilateral

• A triangle with three congruent sides and three
  congruent angles

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Equivalent

• Having the same value

5 1        3.5 0.5        42 12
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estimate

• An answer that is close to the exact answer and
  is found by rounding, by using front-end digits
  by clustering or by using compatible numbers to
  compute

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Hexagon

• A angle with 6 sides and 6 angles

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Factor

• A number multiplied by another number to find a
  product

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fractions

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

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Greatest Common Factor

• Greatest factor that two or more number have in
  commen.

18 1, 2, 3, 6, 9, 18 30 1, 2, 3, 5, 6, 10, 15,
30 6 is the GCF of 18 and 30
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Horizontal line

• A line that can go left to right
• with-out ending.

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Integer

• The set of whole numbers and their opposites

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intersecting lines

• two lines that cross at exactly one point

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Isosceles Triangle A triangle with two
congruent sides
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Line graph

• A graph that uses line segments to show how data
  change over a period of time.

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Mode

• The number or numbers that occur most frequently
  in a set of data there can be one Mode, more
  than one Mode or no Mode.

Examples 2, 3, 4, 5, 5, 6, 7, 8, 8, 8, 9, 11The
mode is 8. 2, 3, 4, 5, 5, 5, 7, 8, 8, 8, 9,
11The modes are 5 and 8. 2, 3, 4, 5, 6, 7, 8, 9,
11, 13, 17There is no mode.
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Numerator

• The top part of a fraction.

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Obtuse Angle

• An angle whose measure is greater than 90 and
  less than a 180.

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Octagon

• An eight-sided polygon

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ordered pair

• A pair of numbers used to locate a point on a
  coordinate point

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origin

• A point on a coordinate plane where the x-axis
  and the y-axis intersect.

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parallel

• Two lines that never meet. They keep going and
  never end.

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parallelogram
A quadrilateral whose opposite sides are parallel
and congruent

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Pentagon

• A five sided polygon.

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percent

• The ratio of a number to 100 percent means per
  hundred.

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Distance Around A Object
Perimeter
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perpendicular

• Lines that intersect to form 90 degree angles

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Pie Graph

• Also known as a circle graph

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Place valueThe value of a digit as determined
by its position in a number
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Polygon

• A polygon is a many sided figure with no curved
  lines, all sides are straight, and is a closed
  figure.

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Prime

• A number that has two factors (one itself).

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Probability

• The chance that a given effect will occur

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product

• product means an answer to a multiplication
  problem.
• 10x10100

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Protractor

• A tool for measuring the size of the opening
  angle.

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Pyramid

• A polyhedron with a base that is a polygon and
  with lateral faces that are triangles which share
  a common vertex

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quadrilateral

• A polygon with four angles and four sides

Examples                                       
                              
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quotient

• An answer to a division problem
• 24/64

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Radius

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

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RANGE

• The difference between the greatest and the least
  numbers in a set of data

The greatest temperature is 83F.The least
temperature is 80F.Since 83 - 80 3, the range
is 3F.
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Ray

• A part of a line that begins at one endpoint and
  extends in one direction forever.

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rectangle

• A polygon with 4 sides and 4 right angles

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Mixed numbers

• A number that is made up of a whole number and a
  fraction.

2 ½
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Reflection (flip)

• The result of a figure flipped over a line
• Example

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

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Right Angle

• An angle that measure is 90

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rotation

• A type of transformation, or movement, that
  results that results when a geometric figure or
  turned about a fixed point.

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Scalene triangle

• A triangle with no
• equal sides

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Similar Shapes

• Figures that have same shape but may not have
  same size.

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Bar Graph

• A graph that compares facts about groups

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Sphere

• A solid figure with all points the same distance
  from the center

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SQUARE

• A RECTANGLE WITH 4
• CONGRUENT SIDES

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Standard Form
A way to write numbers using 0-9 , with each
digit having a place value.
12,543
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Angle that measures 180

• Straight

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sum
12 7 19

• The answer to an addition problem

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Surface area

• The sum of the areas of all the faces, or
  surfaces of, a solid figure
• Area of the face A 11x555
• Area of face B 21x11231
• Area of face C 21x5105
• Area of face D 21x11231
• Area of face E 21x5105
• Area of face F 11x555
• 5523110523110555782
• So, the surface area is 782 in. sq.

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symmetry

• When one half of a figure looks like a mirror
  image of the other half.

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temperature

• The temperature is 80 F

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Translation

• A movement of a geometric figure to a new
  position without turning or flipping it

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Trapezoid

• A quadrilateral with two parallel sides

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Triangle

• A three sided polygon

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variable

• A letter used to represent one or more numbers in
  an expression, equation, or inequality

5a     2x 8     3y 4    10 a, x, and y are
variables.
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vertical

• Vertical are lines that go up and down.

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volume

• The measure of the space a solid figure occupies
• The volume of the cube is 8
• cubic units.

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Whole Numbers

• The set of natural numbers and 0,0,1,2,3,

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180

• It is a straight line.

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Prism

• A polyhedron whose two bases are congruent ,
  parallel polygons in parallel planes and whose
  later faces lateral faces are parallelograms.