With its coverage of plane, solid, coordinate, vector, and non-Euclidean geometry, this text is suitable for high school, college, and continuing education courses as well as independent study. Each new topic is carefully developed and clarified with many examples. More than 2,000 illustrations help students visualize the problems. Every set of exercises is preceded by numerous examples with detailed solutions. Chapters include a vocabulary list, set of review exercises, chapter test, and topics for suggested research. Periodic cumulative reviews offer the opportunity for self-evaluation. Co-written by Alfred S. Posamentier, a bestselling author of high school and university textbooks and pioneer of educational standards, this volume is geared toward high school geometry classes and contains standard material for numerous state competencies. An electronic solutions manual is available upon request.