MATHS - Algebra - Deriving Formulae

We can derive expressions and equations from sentences, and also we can derive formulae such as area and volumes, or quadratics. In this video, we're going to look at deriving formulae. You are usually given information in a diagram or sentences and asked to "show that". Ignore the "show that" as that is the final answer that we're trying to get to. Use the information given to create an equation, which then usually will need rearranging to get to the 'show that' answer. Take these questions step by step, and do not pay much attention to the "show that" information until the end. If in the question you are told the area for example, then that will be what your equation equals and you need to create an expression to find the area.