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# Proofs Without Words II

More Exercises in Visual Thinking

142 pages, parution le 01/01/2000

## Résumé

Proofs Without Words II is a great resource for teachers. The variety of topics addressed makes it valuable at many levels, and is one of its strength. It is organized into chapters dealing with Geometry & Algebra, Trigonometry, Calculus & Analytic Geometry, Inequalities, Integer Sums, Infinite Series, Linear Algebra and other topics. Presented are theorems and statements which are proven mostly through the use of pictures.

The many pictures are presented in a simple format, a style well suited for this book. It reminds many of us of the simplicity and elegance of showing that something is true through the use of pictures. As is probably expected, there are variety (7) of proofs of the Pythagorean Theorem, along with many other geometric proofs. These types of exercises are well-suited for geometry classes, as well as for classes for pre-service teachers. The chapter on integer sums has many proofs concerning figurative numbers, which is a concept that is also quite appropriate for pre-service teachers in both elementary and secondary programs, as well as for students in elementary number theory classes. The pictures presented are delightful and fairly easy to decipher.

There is a beautiful proof about the area under a polygon of arch with a corollary regarding the area of the cycle. Though in the geometry section, this would be quite appropriate for calculus classes as it addresses areas under curves, as well as the idea of limits. Another favorite, and probably the most compact, is "one figure six identities", which proves the sum and difference trigonometric formulas from one figure - a must see for trigonometry classes.

This book is fun for any mathematics enthusiast. As one peruses the book, you're drawn into the "puzzles" as you try to reconstruct the proof. Proofs Without words II is filled with enrichment activities suitable for classes and club activities; it should be on every mathematics teacher's shelf.

## L'auteur - Roger B. Nelsen

Roger Nelsen received his Ph.D. in mathematics from Duke University. Since 1969 he has taught at Lewis & Clark College, where he is professor of mathematics. He currently chairs the editorial board for the Mathematical Association of America's series of Problem Books, and served for ten years as an associate editor of the College Mathematics Journal. He has published expository and research articles in the American Mathematical Monthly, Mathematics Magazine, the College Mathematics Journal, Statistics & Probability Letters, the Journal of Multivariate Analysis, and the Journal of Nonparametric Statistics.

## Sommaire

• Introduction
• Geometry & Algebra
• Trigonometry, Calculus & Analytic Geometry
• Inequalities
• Integer Sums
• Infinite Series, Linear Algebra, & Other Topics
• Names
Voir tout
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## Caractéristiques techniques

 PAPIER Éditeur(s) The Mathematical Association of America (MAA) Auteur(s) Roger B. Nelsen Parution 01/01/2000 Nb. de pages 142 Couverture Broché Poids 265g Intérieur Noir et Blanc EAN13 9780883857212 ISBN13 978-0-88385-721-2

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