Edexcel Maths

• A prime number is a whole number greater than one that has no positive divisors other than one and itself.
• Sine Rule

  
• Equation of a line: y = mx + c
• Compound Interest

  
• Median: (n+1)/2
• INQ = UPP quartile - LOW quartile
• Bearings:

  • Three digits
  • Measured from North
  • Measured clockwise
• LCM: HCF * rest
• HCF: all common factors multiplied together.
• Direct Proportion: y = Kx
• Inverse Proportion: y = K/x
• Circle Theorem:

  • Opposite angles in a cyclic quad sum to 180°
  • Angles in the same segment are equal
  • Alternate segment theorem (Tangent)
  • Angle in semicircle is 90°
  • The angle at the centre is twice that of the angle at the circumference
• Circle Facts:

  • The angle between a tangent and a radius is 90°
• Area of Circle: A = pi x r^2
• Perimeter of circle: P = 2pi x r
• Surface area of a sphere: S = 4pi x r^2
• Calculator formula

  A) Quadratic Formula