This book provides an inquiry-based introduction to advanced Euclidean geometry. It utilizes dynamic geometry software, specifically GeoGebra, to explore the statements and proofs of many of the most interesting theorems in the subject. Topics covered include triangle centers, inscribed, circumscribed, and escribed circles, medial and orthic triangles, the nine-point circle, duality, and the theorems of Ceva and Menelaus, as well as numerous applications of those theorems. The final chapter explores constructions in the Poincare disk model for hyperbolic geometry. The book can be used either as a computer laboratory manual to supplement an undergraduate course in geometry or as a stand-alone introduction to advanced topics in Euclidean geometry. The text consists almost entirely of exercises (with hints) that guide students as they discover the geometric relationships for themselves. First the ideas are explored at the computer and then those ideas are assembled into a proof of the result under investigation. The goals are for the reader to experience the joy of discovering geometric relationships, to develop a deeper understanding of geometry, and to encourage an appreciation for the beauty of Euclidean geometry.

Translations of articles on mathematics appearing in various Russian mathematical serials.

Paul Weiss is one of the two or three most original and creative philosophers and metaphysicians in America today. Creativity and Common Sense reveals why. It contains fourteen recent articles on the thought of Paul Weiss by authors who are most familiar with his writings, including an essay by Charles Hartshorne that provides a unique perspective on Weiss by one who has known him for his entire career. Weiss is shown to be one of the very few contemporary philosophers who examines every area of concern to philosophy and does so on the basis of ontological insights regarding the ultimate elements of reality. He begins his philosophical consideration with the evidences offered by the world of common sense and seeks to provide an adequate and comprehensive account of what he finds there. The contributors to this collection present and examine many of Weiss' strategic insights. They help clarify key elements in his thought and thereby contribute to an appreciation and understanding of his work. They also make evident the importance of Weiss' insights for resolving vexing questions in such diverse areas as the philosophy of science, philosophical methodology, ethics, aesthetics, the philosophy of the human person, and the philosophy of language. This collection makes a significant contribution to the development of Weissian scholarship and to the growing appreciation of the significance of his thought for the discussions of contemporary philosophy.

In an increasingly electronic society, these exercises are designed to help school and collegiate educators use historical devices of mathematics to balance the digital side of mathematics.