Area — Triangles and Quadrilaterals (AQA GCSE Maths): Flashcards

$A = \frac{1}{2} \times \text{base} \times \text{vertical height}$

$A = \text{base} \times \text{vertical height}$

$A = \frac{1}{2}(a + b) \times \text{vertical height}$

The perpendicular distance from base to top (not the sloping height)

Using sloping height instead of vertical height

Break into simple shapes, calculate each, add together

Lengths of the two parallel sides

A triangle is half of a parallelogram

Rearrange formula and solve for the unknown variable

Don't double-count areas or miss sections