Alfred S. Posamentier has published over sixty books in the area of mathematics and mathematics education, including, most recently, The Circle: A Mathematical Exploration beyond the Line (with Robert Geretschlager). After having been on the faculty of the City College of the City University of New York for forty years, where he was a professor of mathematics education and dean of the School of Education, he subsequently held the same positions at Mercy College, New York, for five years. He is currently Chief Liaison for International Academic Affairs at Long Island University. Robert Geretschlager is a mathematics teacher at Bundesrealgymnasium Keplerstrasse in Graz, Austria. He is the coauthor of The Circle (with Alfred S. Posamentier), Geometric Origami, and other works. Charles Li is an Assistant Professor of Mathematics at Mercy College. He earned his Ph.D. in Mathematics from the CUNY Graduate Center, and his B.Eng. in Electrical Engineering from Cooper Union. Christian Spreitzer teaches mathematics and physics at the University College of Teacher Education in Lower Austria.
PRAISE FOR THE WORK OF ALFRED S. POSAMENTIER: [A] joyously nerdy celebration of the history of geometry and trigonometry, exploring the dozens and dozens of curiosities sitting just beneath the surface of a seemingly ordinary triangle. --<i>Sacramento/San Francisco Book Review</i> (reviewing <i>Secrets of Triangles</i>) [Y]et another fine collection of mathematical insights, intriguing relationships, and surprising results focused on the triangle.... [A]n incredibly rich compendium of results that will lead the reader to consistently react in surprise about and appreciation of the richness and unexpected depth of triangular relationships.... [T]he illustrations are excellent. Highly Recommended. --<i>Choice</i> (reviewing <i>The Secrets of Triangles</i>) This volume could be useful to a teacher of mathematics as a source of examples that can hammer home important concepts. --<i>Library Journal</i> (reviewing <i>Magnificent Mistakes in Mathematics</i>)