GCSE Maths (AQA)

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Defining Formulae

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Algebra Notation, Vocabulary and Manipulation

Defining Formulae

3:43 Formulae
Spec A3 A5
Previous Dividing Algebraic Fractions Next Using Formulae
  • A formula is a rule that links two or more variables
  • Formulae are used to calculate something for a specific purpose
  • The subject of a formula is the thing we're trying to work out
  • Not every formula has a subject, but most do or can be rearranged until they do
  • The perimeter of a shape can be calculated by adding up all the sides
  • The missing height of the shape is 7 units
  • The missing width of the shape is y minus x units
  • The formula for the perimeter of the shape is 2y + 20 or 2y + 10 (factorized)

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