Area formulae (AQA GCSE Maths): Flashcards

$A = lw$ (length × width)

$A = \frac{1}{2}bh$ (half base × height)

$A = bh$ (base × vertical height)

$A = \frac{1}{2}(a + b)h$ (avg parallel sides × height)

Perpendicular distance from base to opposite vertex/side

Using slanted side instead of perpendicular height

Mixing units causes errors; must use same unit throughout

$\text{cm}^2$ (square centimeters)

Triangle area is exactly half the rectangle area

Not given; must memorise all formulae