maths

• what is the equation for speed?

  distance / time
• what is the equation for density?

  Density = mass/volume
• what is the sine rule?

  a/sinA = b/sinB
• what is the cosine rule formula?

  a^2 = b^2 + c^2 - 2bc cosA
• what is the equation for the volume of a cuboid?

  length x width x height
• what is the formula for the volume of a prism?

  area of cross section x length
• what is the equation for the volume of a cylinder?

  πr^2h
• what is the equation for the volume of a pyramid?

  1/3 x area of base x height
• what is the area for a trapezium?

  1/2(a+b)h
• how do you find the circumference of a circle?

  πd
• how do you find the circumference of a circle? (2)

  2πr
• how do you find the area of a circle?

  πr^2
• how do you calculate the percentage change?

  new/old X100
• how do you calculate the range?

  subtract the lowest number from the biggest number.
• how do you calculate the mode?

  the most common value