Surface Area of Pyramids and Cones (HSC SSCE Mathematics Standard): Flashcards

Distance from apex to base edge along triangular face

Different measurements; cannot be used interchangeably

$SA = s^2 + 4 \times \left(\frac{1}{2}sl\right)$

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

Side length of the square base

Slant height

$\pi r^2$ (base) and $\pi rl$ (curved surface)

$l^2 = h^2 + r^2$

When given $h$ and $r$ but not $l$

Square units (cm², m², etc.)