# 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**