Geometry of Cones

is a pyramid with

a flat base, curved wall

and pointy end

Cone in Geometry

apex

base

A Cone is made by rotating a triangle

radius

heig

ht

h

r r

h

base area + side wall area = π r2 + π r s = π r (r + s)

end areas + side wall area = 2(π r2) + 2π r h

= 2π r (r + h)

volume base area X height

= π r2 h

cone’s volume = 1 3

cylinder’s volume 1

2 3