maths

• speed,distance,time


  distance=speed x time
• volume,density,mass


  mass= density x volume
• pressure,force,area


  force= pressure x area
• working out a side in right angle traingle


  SoHCaHToA
• parallelogram area


  base x height
• trapezium area


  (a + b) divide by 2 x height
• circle area


  𝜋r squared
• circumference of circle

  2πr
• rectangle perimeter/area


  l x w
• cylinder volume


  $pir^2h$
• mean


  (sum of all numbers added) divided by how many
• median


  middle value when data is in numerical order
• mode


  most common value
• f(x)+?


  + up

  - down
• f(x-?)

  +left

  -right
• -f(x)


  reflection x axis
• f(-x)


  reflection in y axis
• the angle at the circumference is half the angle at the centre 


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• the angle in a semi-circle is 90°

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• the angles in the same segment from a common chord are equal

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• the opposite angles in a cyclic quadrilateral always add up to 180°

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• the angle between a radius and a tangent is 90°

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• the angle between the chord and the tangent is equal to opposite angle inside the triangle

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• the tangents to a circle from the same point will be equal length

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• the radius through the midpoint of a chord will bisect the chord at 90°


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• sin x


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• cos x


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• tan x


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