The Cone (Leaving Cert Mathematics): Flashcards

3D shape with circular base tapering to a single point (vertex)

Cone with vertex directly above centre of circular base

Vertical distance from vertex to centre of base

Distance from vertex to any point on edge of base

Distance from centre of base to its edge

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

$V = \frac{1}{3}\pi r^2 h$

Perpendicular height (h)

$\pi r l$

Slant height (l)

$\pi r l + \pi r^2$

Confusing perpendicular height (h) and slant height (l)