Truncated cone area

A truncated cone is a shape obtained by cutting a cone with a plane parallel to the base and not containing a vertex. The height of a truncated cone is a straight line segment connecting two bases perpendicularly or the shortest distance between the edges of two bases. Radii are the radii of their bases.

Total surface area in terms of radii and height

Bottom base radius r1
Top base radius r2
Height l

The lateral surface area of ​​the truncated cone

Bottom base radius r1
Top base radius r2
Generating l