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GCSE algebraic area - how to find expressions for the area of shapes

AT GCSE, to be able to access the higher grades, it is important to be able to find an expression for an area in terms of algebra WHEN the dimensions of the shape have been given in terms of algebra. This video talks through finding the area of a rectangle, triangle and trapezium, setting up quadratic equations which could then be used to solve for the variable x if asked.
Length: 04:35

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