Maths Dictionary

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MathsDictionary
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Click on the first letter of the word you want to
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a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
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a

• Acute angle
• An angle less than 90 degrees.
  (not to scale)
• Area
• Measurement of the space covered by a 2D shape.
• Average (mean, median and mode)
• add up all the values in the data set and divide
  the total by the number of values that there are.

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b

• Bar chart
• A chart in bars that shows the value of
  something.
• Brackets
• Something that separates pieces of information in
  an equation that need to be done first.

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c

• Centimetre (millimetre, metre and kilometre)
• a unit of measurement used to measure length
  100cm1m 10mm1cm.
• Circumference
• The measurement of an outside of a circle.
• Cone
• A 3D shape with 2 faces, 1 of which is a circle.
  It has 1 vertex .
• Congruent
• Equal in size and shape
• Co-ordinates
• Points that are plotted using numbers from the
  horizontal and vertical axis. The first value
  represents the horizontal axis and the second
  value represents the vertical axis. Walk before
  you fly .

• Cuboid
• A 3D shape that has 6 faces, 2 of which are a
  square and 4 that are a rectangle.
• Cylinder
• A 3D shape that has 3 sides, 2 of which are
  circles.
• Cube (shape)
• A 3D shape with 6 equal sides.
• Cube number
• When something is multiplied by itself and by
  itself again e.g.3x3x327
• Capacity
• An amount that something can hold
• Cube root
• The inverse of the cube number e.g. .the cube
  root of 27 is 3

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d

• Diameter
• From 1 side to another on a circle. Double the
  radius.
• Difference
• Subtract the lowest number from the highest .
• Digit
• A symbol that is used to make a number e.g. A
  3-digit number 135.

• Decimal place
• a number after the decimal point
• Decimal point
• A point that separates whole numbers and decimal
  places
• Decrease
• Getting smaller
• Degree (angle)
• A measurement of an angle
• Degree (temperature)
• A measurement of temperature
• Diagonal
• Somewhere between vertical and horizontal.

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e

• even
• A number that is a multiple of 2.
• Equivalent fractions
• The same amount they just have different
  numerators and denominators.

• Edge
• When 2 faces meet in a 3D shape.
• Equals
• The same as.
• Equilateral triangle
• A 3 sided shape with all the sides and angles the
  same.

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f

• Figure
• A number written in digits.
• Face
• A side of a 3D shape.
• Factor
• A number that is divisible by a number exactly.
• Fraction
• A number is part of a whole when the whole has
  been split into equal parts.

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g

• Gram
• A unit of measurement for weight.

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h

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i

• Irregular shape
• Its sides are not all the same length.
• Isosceles triangle
• A 3 sided shape that has 2 angels and sides the
  same and 1 different.

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j
13
k
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l

• Line graph
• Line graphs are often used for showing changes
  over time
• Line of symmetry
• A line which a mirror can be put and will look
  like the shape
• Litre(millilitre)
• A unit of measurement for liquid.

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m

• Mass
• Measured in kilograms grams and tonnes
• Minus
• Take away
• Multiple
• A number that goes into a number exactly

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n

• Negative number
• A number below 0
• Net of a 3d shape
• If the net was folded correctly it would make a
  3d shape
• Numerator and denominator
• the numerator is the number on top of the
  fraction and the denominator is the opposite

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o

• Obtuse angle
• an angle more than 90 but less than 180
• Odd
• A number that is not a multiple of 2

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p

• Paralleltwo lines that will never meet
• Percentage
• Out of one hundred
• Perimeter
• The outside of a shape
• Perpendicular
• Two lines that meet to make a right angle
• Pictogram
• It is uses little pictures to show information
• Pie chart
• A chart in the shape of a pie divided up to show
  information
• Prime number
• A number which can only be divided by itself and
  1
• Probability
• The chance of something happening
• Product
• To multiply

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q

• Quotient
• The whole number part of a division

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r

• Radius
• The distance from the centre to the Circumference
  of a circle
• Range
• Subtract the smallest from the biggest to get the
  range
• Reflex
• An angle between 180 and 360
• Remainder
• the leftover part of a division
• Right angled triangle
• a triangle with 1 right angle
• Rotational symmetry
• It looks the same when rotated but not if rotated
  360

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s

• Scalene triangle
• A triangle with all sides and angles different
• Sphere
• A ball shape 3D shape
• Square
• A four sided shape with all sides the same length
  and 4 angles all at 90
• Square number
• The result of a number multiplied by itself
• Square root
• Something multiplied by itself

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t

• Tessellation
• Shapes that fit together without leaving any gaps
• Triangular number
• all the multiples of 3
• Triangular prism
• A 3D shape made up from 2 triangles and 3
  rectangles

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u
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v

• Vertex
• Where 2 faces meet on a 3D shape
• Volume
• The amount of space covered by something

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w
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x
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y
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z