The Manual of Plane Geometry, On The Heuristic Plan: With Numerous Extra Exercises, Both Theorems And Problems, For Advance Work (1891) by George Irving Hopkins is a comprehensive guide to plane geometry. The book is designed to help students develop a deep understanding of the subject by providing a heuristic approach to problem-solving. The author includes numerous extra exercises, both theorems and problems, to help students improve their skills and prepare for advanced work in the field. The book is written in clear and concise language, making it accessible to students of all levels. It covers a wide range of topics, including points, lines, angles, triangles, circles, and more. This manual is an excellent resource for students, teachers, and anyone interested in learning more about plane 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.