Areas (Edexcel GCSE Maths): Flashcards

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

Vertical (perpendicular) height, not sloping height

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

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

Identify basic shapes, calculate each area, add them up

$\pi r^2$

$\pi D$ or $2\pi r$

$\frac{x}{360} \times$ Area of full circle

$\frac{x}{360} \times$ Circumference of full circle

Sector area $-$ Triangle area

Curved part plus the diameter (straight edge)

$\pi \approx 3.142$