Area of Rectangles & Triangles

MathematicsAQAEdexcelGCSEUnit: Geometry & Measures
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The basics

What is Area?

What is Area?

Area measures how much SPACE a shape covers - like how many square tiles would fit inside it. If you're painting a wall or laying carpet, you need to know the area! We measure area in SQUARE units (cm², m², etc.)

Visual: Area Formulas

Diagram showing area formulas for 5 shapes: Rectangle (length × width), Triangle (½ × base × height), Parallelogram (base × perpendicular height), Trapezium (½(a+b) × height), Circle (πr²). Each shape shows labelled dimensions.

Remember: Height must be PERPENDICULAR (at 90°) to the base

Spotlight
The Key Formulas

Important: For triangles, the HEIGHT must be PERPENDICULAR (at 90°) to the base!

Now try it yourself

Quiz · Question 1 of 12

Which formula gives the area of a rectangle with length l and width w?

Tap an answer to check it

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Perimeter

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Area of Parallelograms & Trapeziums

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