The Elements of Plane and Solid Geometry is a comprehensive textbook written by H. W. Watson. The book covers the fundamental concepts of geometry, including Euclidean geometry, the properties of lines, angles, triangles, and circles, as well as the geometry of three-dimensional objects such as prisms, pyramids, cones, and spheres. The text is designed for students and teachers of mathematics at the high school and undergraduate level. The book provides clear explanations of the concepts, with numerous examples and exercises to reinforce understanding. The book is organized into chapters, each covering a specific topic in geometry. The chapters are arranged in a logical order, starting with the basics and progressing to more advanced topics. The book is written in a clear and concise style, making it accessible to students of all levels. Overall, The Elements of Plane and Solid Geometry is an essential resource for anyone studying or teaching geometry.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world’s literature in affordable, high quality, modern editions, that are true to their original work.