Surface Area (VCE SSCE General Mathematics): Flashcards

Total area of all outer surfaces of a 3D object

Square units (e.g. $\text{cm}^2$, $\text{m}^2$, $\text{mm}^2$)

Flat 2D pattern showing all faces of a solid shape

$SA = 2\pi r^2 + 2\pi rh$

$SA = 4\pi r^2$

Two circular ends and one rectangle

$2\pi r$ (circumference of circular ends)

Flat surfaces on solid objects

One square base + four triangular faces

Remember to square the radius