maths formulae
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Last updated 9:36 PM on 3/18/23
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58 Terms
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Area of a rectangle
Length x Width
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Area of a parallelogram
base x height
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Area of a triangle
1/2 base x height
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Area of a trapezium
1/2 (a+b) x height
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Volume of a cuboid
length x width x height
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Volume of a prism
Area of cross section x length
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Volume of a cylinder
πr² x height
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Volume of a pyramid
1/3 x area of base x height
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circumfrence formula
2πr
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perimeter of a sector
( Angle x 360 ) × (𝜋D)+ 2r
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circumfrence formula
πd
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Area of a circle
πr²
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Area of a sector
(angle/360) x πr²
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Arc Length
angle/360 x π x diameter
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Gradient of a line
change in y/change in x
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sin theta
opposite/hypotenuse
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cos theta
adjacent/hypotenuse
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tan theta
opposite/adjacent
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Speed
distance/time
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Density
mass/volume
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pressure
force/area
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Find radius from circumference
circumfrence/2/ π
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Sum of interior angles
(n-2) x 180
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Frequency density
Frequency/class width
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Surface area of a sphere
4πr²
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Cosine Rule for Angles
CosA =b² + c² -a² / 2 x b x c
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inversely proportion formula
y\=k/x
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direct proportion formula
y \= kx
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What is the sin of 0 degrees?
0
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What is the cos of 0 degrees?
1
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what is the tan of 0 degrees?
0
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What is the sin of 30 degrees?
1/2
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What is cos of 30 degrees?
√3/2
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What is the tan of 30 degrees?
√3/3
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What is sin of 45 degrees?
√2/2
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what is the cos of 45 degrees?
√2/2
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What is the tan of 45 degrees?
1
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What is the sin of 60 degrees?
√3/2
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what is cos of 60 degrees
1/2
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What is the tan of 60 degrees?
√3
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What is the sin of 90 degrees?
1
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What is the cos of 90 degrees?
0
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what is tan of 90 degrees?
not defined
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Surface Area of a Cylinder
2πr(r + h)
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sum of exterior angles in a polygon
360/number of sides
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depreciation
\
\
\
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amount in a sample
Group number/total x sample size
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Calculating original value after percentage change
New value (1 x %/100)
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A U B
everything in both sets
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A ∩ B
everything in the the overlap of both sets
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A’
everything not in set A
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(A U B)’
Everything outside the venn diagram
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A ∩ B'
everything in set A
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A ∪ B'
everything not in B
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universal set ξ
contains everything
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‘
not
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U
union (A and B)
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∩
In A and in B