mathematics EDITORIAL BOARD Editor in Chief Barry Max Brandenberger, Jr. Curriculum and Instruction Consultant, Cedar Park, Texas Associate Editor Lucia Romberg McKay, Ph.D. Mathematics Education Consultant, Port Aransas, Texas Consultants L. Ray Carry, Ph.D. Pamela D. Garner EDITORIAL AND PRODUCTION STAFF Cindy Clendenon, Project Editor Linda Hubbard, Editorial Director Betz Des Chenes, Managing Editor Alja Collar, Kathleen Edgar, Monica Hubbard, Gloria Lam, Kristin May, Mark Mikula, Kate Millson, Nicole Watkins, Contributing Editors Michelle DiMercurio, Senior Art Director Rita Wimberley, Buyer Bill Atkins, Phil Koth, Proofreaders Lynne Maday, Indexer Barbara J. Yarrow, Manager, Imaging and Multimedia Content Robyn V. Young, Project Manager, Imaging and Multimedia Content Pam A. Reed, Imaging Coordinator Randy Bassett, Imaging Supervisor Leitha Etheridge-Sims, Image Cataloger Maria L. Franklin, Permissions Manager Lori Hines, Permissions Assistant Consulting School Douglas Middle School, Box Elder, South Dakota Teacher: Kelly Lane Macmillan Reference USA Elly Dickason, Publisher Hélène G. Potter, Editor in Chief ii mathematics 2 VOLUME Da-Lo Barry Max Brandenberger, Jr., Editor in Chief Copyright © 2002 by Macmillan Reference USA, an imprint of the Gale Group All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photo- copying, recording, or by any information storage and retrieval system, with- out permission in writing from the Publisher. Macmillan Reference USA Macmillan Reference USA 300 Park Avenue South 27500 Drake Rd. New York, NY 10010 Farmington Hills, MI 48331-3535 Library of Congress Cataloging-in-Publication Data Mathematics / Barry Max Brandenberger, Jr., editor in chief. p. cm. Includes bibliographical references and index. ISBN 0-02-865561-3 (set : hardcover : alk. paper) - ISBN 0-02-865562-1 (v. 1 : alk. paper) ISBN 0-02-865563-X (v. 2 : alk. paper) - ISBN 0-02-865564-8 (v. 3 : alk. paper) - ISBN 0-02-865565-6 (v. 4 : alk. paper) 1. Mathematics-Juvenile literature. [1. Mathematics.] I. Brandenberger, Barry Max, 1971- QA40.5 .M38 2002 510-dc21 00-045593 Printed in the United States of America 1 2 3 4 5 6 7 8 9 10 Table of Contents VOLUME 1: Brain, Human Bush, Vannevar Preface List of Contributors C Calculators A Calculus Abacus Calendar, Numbers in the Absolute Zero Carpenter Accountant Carroll, Lewis Accuracy and Precision Cartographer Agnesi, Maria Gaëtana Census Agriculture Central Tendency, Measures of Air Traffic Controller Chaos Algebra Cierva Codorniu, Juan de la Algebra Tiles Circles, Measurement of Algorithms for Arithmetic City Planner Alternative Fuel and Energy City Planning Analog and Digital Comets, Predicting Angles, Measurement of Communication Methods Angles of Elevation and Depression Compact Disc, DVD, and MP3 Technology Apollonius of Perga Computer-Aided Design Archaeologist Computer Analyst Archimedes Computer Animation Architect Computer Graphic Artist Architecture Computer Information Systems Artists Computer Programmer Astronaut Computer Simulations Astronomer Computers and the Binary System Astronomy, Measurements in Computers, Evolution of Electronic Athletics, Technology in Computers, Future of Computers, Personal B Congruency, Equality, and Similarity Babbage, Charles Conic Sections Banneker, Benjamin Conservationist Bases Consistency Bernoulli Family Consumer Data Boole, George Cooking, Measurement of Bouncing Ball, Measurement of a Coordinate System, Polar v Table of Contents Coordinate System, Three-Dimensional Flight, Measurements of Cosmos Form and Value Cryptology Fractals Cycling, Measurements of Fraction Operations Fractions PHOTO AND ILLUSTRATION CREDITS GLOSSARY Functions and Equations TOPIC OUTLINE G VOLUME ONE INDEX Galileo Galilei Games VOLUME 2: Gaming Gardner, Martin D Genome, Human Dance, Folk Geography Data Analyst Geometry Software, Dynamic Data Collxn and Interp Geometry, Spherical Dating Techniques Geometry, Tools of Decimals Germain, Sophie Descartes and his Coordinate System Global Positioning System Dimensional Relationships Golden Section Dimensions Grades, Highway Distance, Measuring Graphs Division by Zero Graphs and Effects of Parameter Dürer, Albrecht Changes E H Earthquakes, Measuring Heating and Air Conditioning Economic Indicators Einstein, Albert Hollerith, Herman Electronics Repair Technician Hopper, Grace Encryption Human Body End of the World, Predictions of Human Genome Project Endangered Species, Measuring Hypatia Escher, M. C. Estimation I Euclid and his Contributions IMAX Technology Euler, Leonhard Induction Exponential Growth and Decay Inequalities Infinity F Insurance agent Factorial Integers Factors Interest Fermat, Pierre de Interior Decorator Fermat’s Last Theorem Fibonacci, Leonardo Pisano Internet Field Properties Internet Data, Reliability of Financial Planner Inverses vi Table of Contents K Morgan, Julia Knuth, Donald Mount Everest, Measurement of Kovalevsky, Sofya Mount Rushmore, Measurement of Music Recording Technician L N Landscape Architect Nature Leonardo da Vinci Navigation Light Negative Discoveries Light Speed Nets Limit Newton, Sir Isaac Lines, Parallel and Perpendicular Number Line Lines, Skew Number Sets Locus Number System, Real Logarithms Numbers: Abundant, Deficient, Perfect, Lotteries, State and Amicable Lovelace, Ada Byron Numbers and Writing Photo and Illustration Credits Numbers, Complex Glossary Numbers, Forbidden and Superstitious Topic Outline Numbers, Irrational Volume Two Index Numbers, Massive Numbers, Rational Numbers, Real VOLUME 3: Numbers, Tyranny of Numbers, Whole Nutritionist M Mandelbrot, Benoit B. O Mapping, Mathematical Ozone Hole Maps and Mapmaking Marketer P Mass Media, Mathematics and the Pascal, Blaise Mathematical Devices, Early Patterns Mathematical Devices, Mechanical Percent Mathematics, Definition of Permutations and Combinations Mathematics, Impossible Pharmacist Mathematics, New Trends in Photocopier Mathematics Teacher Photographer Mathematics, Very Old Pi Matrices Poles, Magnetic and Geographic Measurement, English System of Polls and Polling Measurement, Metric System of Polyhedrons Measurements, Irregular Population Mathematics Mile, Nautical and Statute Population of Pets Millennium Bug Postulates, Theorems, and Proofs Minimum Surface Area Powers and Exponents Mitchell, Maria Predictions Möbius, August Ferdinand Primes, Puzzles of vii Table of Contents Probability and the Law of Large Numbers Space, Commercialization of Probability, Experimental Space Exploration Probability, Theoretical Space, Growing Old in Problem Solving, Multiple Approaches to Spaceflight, Mathematics of Proof Sports Data Puzzles, Number Standardized Tests Pythagoras Statistical Analysis Step Functions Q Stock Market Stone Mason Quadratic Formula and Equations Sun Quilting Superconductivity Surveyor R Symbols Radical Sign Symmetry Radio Disc Jockey Randomness T Rate of Change, Instantaneous Telescope Ratio, Rate, and Proportion Television Ratings Restaurant Manager Temperature, Measurement of Robinson, Julia Bowman Tessellations Roebling, Emily Warren Tessellations, Making Roller Coaster Designer Time, Measurement of Rounding Topology Photo and Illustration Credits Toxic Chemicals, Measuring Glossary Transformations Topic Outline Triangles Volume Three Index Trigonometry Turing, Alan VOLUME 4: U Undersea Exploration S Universe, Geometry of Scale Drawings and Models Scientific Method, Measurements and the V Scientific Notation Variation, Direct and Inverse Sequences and Series Vectors Significant Figures or Digits Virtual Reality Slide Rule Vision, Measurement of Slope Volume of Cone and Cylinder Solar System Geometry, History of Solar System Geometry, Modern W Understandings of Solid Waste, Measuring Weather Forecasting Models Somerville, Mary Fairfax Weather, Measuring Violent Sound Web Designer viii Table of Contents Z Topic Outline Zero Cumulative Index Photo and Illustration Credits Glossary ix Dance, Folk D Both mathematics and dance are languages that use symbols to convey ideas and expressions. Mathematics uses written symbols to represent abstrac- tions so that users can arrive at a greater understanding of a problem with- out ambiguity. Dancers use abstract symbols to represent thoughts, ambiguity the quality of feelings, emotions, and ideas, and these symbols may be interpreted in mul- doubtfulness or uncer- tainty tiple ways. Both disciplines rely to a large extent on pattern recognition. abstract having only Many forms of dance, such as classical ballet, involve complex patterns intrinsic form and take years of practice to master. Yet other forms of dance use everyday movements with more simplistic patterns. For example, folk dances have evolved from common movements of work and play. Although folk dances require concentration and focus, their use of every- day movement invites observers to participate. Similarly, mathematics can be studied at the basic level of arithmetic, which is used to make simple transactions and to understand how things work. More advanced mathe- matics, such as calculus, chaos theory, or abstract algebra require years calculus a method of to master. dealing mathematically with variables that may be changing continu- Discreteness in Mathematics and Dance ously with respect to each other Many dances are based on a simple method of counting and discrete se- chaos theory the quali- quences, which enables participants to recognize and learn a variety of tative study of unstable dances. The word “discrete” also has a common, similar usage in mathe- aperiodic behavior in matics. Discrete mathematics involves counting separate elements, such as deterministic nonlinear dynamical systems the number of arrangements of letters on a license place, or the number of ways that a presidential candidate can visit all fifty states. Solutions in dis- abstract algebra the branch of algebra deal- crete mathematics can be only whole units. Discrete math is therefore one ing with groups, rings, of the most accessible areas of modern mathematics since many of the ques- fields, Galois sets, and tions are easy for anyone to understand. number theory Contradancing. Contradancing is a popular form of folk dance in the discrete composed of distinct elements United States that illustrates the mathematics of dance. Its origins go back to colonial days, and its roots can be traced to English country dances. Contradancing, which shares elements of traditional square dancing, is set dancing a form of dance in which dancers a form of set dancingin which a dancer’s position relative to another dancer are guided through a traces patterns on the dance floor. As in most dancing, timing is crucial, as series of moves by a is the ability to rapidly carry out called instructions. caller 1
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