Higher tear formulas - Maths

• The formula to calculate the perimeter of a circle is P = 2 * pi * r
• The formula to calculate the area of a triangle is A = (1/2) * base * height
• The formula to calculate the surface area of a sphere is A = 4 * pi * r^2
• The formula to calculate the volume of a cylinder is V = h * pi * r^2
• The formula to calculate the surface area of a sphere is SA = 4 * pi * r^2
• The formula to calculate the volume of a sphere is V = (4/3) * pi * r^3
• Population density= population/Area
• Density= Mass/Volume and is measured in g/cm3
• Speed = Distance/Time and is measured in m/s, km/h or mph.
• Pythagoras in right angled triangle = a2+b2=c2 (2 stands for squared).
• Trigonometry in a right angled triangle is SOH CAH TOA
• Frequency Density is the frequency/ class width (frequency is usually the hight of the bars on histograms)
• Sum of interior angles of polygons always add up to 360 degrees.
• Probabiltiy is wrritten as:

  P(a)orP(b)=P(a)=P(b)

  P(a)andP(b)=P(a)*P(b)
• Mean and grouped data:

  Sum (of mid point *Frequency)/ Total frequency.
• equation of a straight line:

  y=mX+c
• What's the area of a circle?

  πr^2
• Whats the circumference of a circle?

  Pi * d
• Percentage increase = increase/original value *100
• Area of parallelogram = Base * perpendicular height.
• Volume of Cuboid = L*W*H
• Arc lenght = 0/360 * pi *d
• Sector Area = 0/360 *pi*r^2
• Similarity:

  SF area = (SF length)^2

  SF Volume=(SF length)^2