Right Pyramids, Right Cones and Spheres (Grade 11 NSC Matric Mathematics): Flashcards

Height from apex to base centre is perpendicular to base

$4\pi r^2$

$\frac{4}{3}\pi r^3$

$b(b + 2h_s)$

$\frac{1}{3}$

$\pi r(r + h)$

$\frac{1}{3}\pi r^2H$

Perpendicular height (H), not slant height

Base area + lateral surface area

Single point where triangular faces meet