Solving area problems (AQA GCSE Maths): Flashcards

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Solving area problems
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Composite shapes

Complex shapes made of simpler shapes like rectangles, triangles, and circles

Three methods for composite shapes

Addition, Subtraction, Combination methods

Addition method for composite shapes

Divide shape into parts and add areas together

Subtraction method for composite shapes

Calculate large shape minus cutouts/holes

Addition method formula

Area=Rectangle+Triangle\text{Area} = \text{Rectangle} + \text{Triangle}

Subtraction method formula

Area=Large shapeSmall shape\text{Area} = \text{Large shape} - \text{Small shape}

First step before calculating area

Find all missing lengths using given measurements

Keywords indicating area is needed

Cover, paint, carpet

Keywords indicating perimeter is needed

Fence, border, frame

Why not measure diagrams with ruler?

Diagrams are not drawn to scale

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