Jacobs Geometry Seeing Doing Understanding Textbook - 3rd Edition Author:Harold R. Jacobs Jacobs' Geometry: Seeing, Doing, Understanding, 3rd Edition features a unique, proof-based approach to geometry that integrates discussions, cartoons, anecdotes, examples, and plenty of exercises. With a greater emphasis on problems, rather than long introductory instructions, this is a great text for learning-through-doing. Sixteen units plus a... more » final review are included and together cover: lines, angles, direct and indirect proofs, congruence, inequalities, parallel lines, quadrilaterals, transformations, area, similarity, triangles, circles, concurrence theorems, non-Euclidean geometries, and more. A section for the postulates and theorems is included in the back of the book, along with answers to selected exercises. 780 pages with full-color illustrations; indexed; hardcover. Non-consumable text. 3rd Edition. Grades 7-12.« less