This document discusses how to construct a cone-shaped plant pot and provides instructions and formulas. It defines a cone as a three-dimensional figure generated by a circle rotating around its diameter. It gives the formulas for the lateral area, total area, and volume of a cone. It provides steps for constructing a cone, including using a circular sector to form the shape before assembling it. Measurements for an example cone are given. In conclusion, it states that a circular sector is necessary to construct a cone.