A solid with a circular base and a curved side that ends in one point

It has one vertex.

Volume of a cone

It has one vertex.

Volume of a cone

= 1/3 Ï€r2h

where r is the radius of the widest part of the cone, and h is the height of the cone.

Surface area of a cone (including base):

= Ï€r2 + Ï€rs

Surface area of a cone (excluding base):

= Ï€rs