 Analytic Geometry Formulas  Math Forum; Ask Dr. Math FAQ
Analytic geometry (a branch of geometry in which points are represented with respect to a coordinate system, such as cartesian coordinates) formulas for figures in one, two, and three dimensions: points, directions, lines, triangles, polygons, conic sections,
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 Analytic Geometry  Jim Loy
This is a quick introduction to analytic geometry, graphing functions in a coordinate system, that foreshadows the derivative.
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 Analytic Geometry: One Dimension  Math Forum; Ask Dr. Math FAQ
Formulas for analytic geometry figures and concepts in one dimension: points, general quadratic equations, and circles.
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 Analytic Geometry: Polar Coordinates (Ask Dr. Math FAQ)  Math Forum
A discussion of polar coordinates, and formulas for points, directions, translations, rotations, lines, triangles, and conic sections in polar coordinates.
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 Analytic Geometry: Spherical Coordinates (Ask Dr. Math FAQ)  Math Forum
A discussion of spherical coordinates and their common uses.
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 Analytic Geometry: Three Dimensions  Math Forum; Ask Dr. Math FAQ
Formulas for analytic geometry figures and concepts in three dimensions: points, directions, lines, planes, triangles, tetrahedra, general quadratic equations and quadric surfaces, and spheres.
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 Analytic Geometry: Two Dimensions  Math Forum; Ask Dr. Math FAQ
Formulas for analytic geometry figures and concepts in two dimensions: points, directions, lines, triangles, polygons, conic sections, and general quadratic equations.
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 Analyzing Numeric and Geometric Patterns of Paper Pool (iMath Investigations)  Illuminations; National Council of Teachers of Mathematics (NCTM)
An online, interactive, multimedia math investigation. The interactive paper pool game in this iMath investigation provides an opportunity for students to further develop their understanding of ratio, proportion and least common multiple. Students develop
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 Ancient India's Contribution to Mathematics  Sudheer Birodkar
Algebra and Geometry in Ancient India, where mathematics had its roots in Vedic literature, nearly 4000 years old. Between 1000 B.C. and 1000 A.D. various treatises on mathematics were authored by Indian mathematicians in which
were set forth for the
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 Ancient Mathematics  SunSITE's Vatican Exhibit; Library of Congress
Math history: math and astronomy in the ancient world. Greek Mathematics, Ptolemy's Geography, Greek Astronomy. Scholarship supported science in this world where faith and science were not yet seen as two irreconcilable cultures. Euclid (Elements, Optics);
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 Ancient Writings Revealed!  The Exploratorium
Ancient ideas met modern science at the Exploratorium, San Francisco, CA, on August 4, 2006. Using stateoftheart scientific tools, oncehidden writings by the ancient Greek mathematician Archimedes were uncovered, revealing evidence of science not
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 ... and Math Tutoring  Stuart Raffeld
This oneonone tutoring service meets tutees throughout California's West San Fernando Valley, and also tutors online, overthephone, and by email. Posts in Stu's blog, which date back to February, 2011, have included "Ten Ways to Improve your SAT
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 Andrei Nikolaevich Kolmogorov  Alexander Adamchuk
Curriculum vitae, biography, conference announcement, memorial readings, and links about Andrei Nikolaevich Kolmogorov.
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 Andrew M.H. Alexander
JavaScript by Alexander includes "the gear seer," which shows not just bike gear ratios but gear inches and meters development. Input wheel and tire size to see speed at a given cadence. This bicycle drivetrain visualizer further compares different drivetrains,
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 Andrew Odlyzko
Home page of the Head of the Mathematics and Cryptography Research Department at AT&T Labs. The site contains a comprehensive list of his papers, most of which may be downloaded in LaTex, PDF, or PostScript form if they are not available as plain
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 Andrew Ranicki's Homepage  Andrew Ranicki
Articles, video clips, bibliographies, and other assorted resources from the Scottish topologist and knot theorist who practices algebraic surgery, a classification method in topology for cutting up manifolds: the Jordan Curve Theorem and the classification
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 Andy Norton's Web Page  Dept. of Mathematics Education, Univ. of Georgia
Illustrated essays and explorations of algebra and geometry using various technology, including TI85 calculators, CBL's and computer software such as Geometer's Sketchpad (with sketches to download), Algebra Expressor, and Excel, by a grad student in
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 Angela Andrews  District 86
Files shared during a Common Core State Standards (CCSS) Mathematics workshop by Andrews, host of the DuPage Children's Museum's Aunty Math site: Comparing Ordering Sequencing and Rounding, Dangers of Touch Math, Emergent Learner Activities, Experiences
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 The Angle Bisectors  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A discussion of why the anglebisectors of a triangle meet at the incenter of the triangle, in several different ways, involving: cevians, the transitivity property of equality, axes of a 2line, altitudes and orthic triangles, and complex numbers.
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 The Angle Defect of a Polyhedron (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
The angle defect at a vertex of a polygon is defined to be 2 pi minus the sum of the angles at the corners of the faces at that vertex. What is the angle sum for a polygon (in the plane) with n sides? Determine the total angle defect for each of the 5
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 Angles and angle terms  Mark Motyka, Math League Multimedia
Definitions and illustrations: What is an angle?; Degrees: measuring angles; Acute angles; Obtuse angles; Right angles; Complementary angles; Supplementary angles; Vertical angles; Alternate interior angles; Alternate exterior angles; Corresponding angles;
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 Angles of Reflection  John Benson and P. J. Karafiol
A backandforth intergenerational blog on math education, begun in January, 2011, by two Presidential Awardees in Mathematics from the state of Illinois.
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 AngryMath  Daniel R. Collins
Blog by an adjunct math lecturer at Kingsborough Community College who believes that "Math is a battle. It is a battle that feels like it must be fought ...," and for whom "math isn't beautiful or fun, but it is powerful, and that's what we need from
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 Animals & Art  M. Crook
A gallery of fractal images created using Ultra Fractal.
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 Animated Educational Software  FLIX Productions
Shareware for PC platforms, including programs designed to teach children about money, timetelling, shapes, math (counting, addition, subtraction for preK through 1st grade), and multiplication and division (for 1st3rd graders).
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 Animated Math Glossary  Math Advantage  Harcourt Brace School Publishers
A K8 glossary of common mathematical terms, categorized by grade. Each entry has an example, most of which are animated. An "other" section at the end of the alphabet gives tables of metric and customary measurements, time, formulas, and symbols. You
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 Animated Proof of the Pythagorean Theorem  Mark D. Meyerson; Mathematics Dept., U.S. Naval Academy
Starting with a right triangle and squares on each side, the middle size square is cut into congruent quadrilaterals (the cuts through the center and parallel to the sides of the biggest square). Then the quadrilaterals are hinged and rotated and shifted
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 The Animated Telegraph Equation  Joel Feldman; Department of Mathematics, Univ. of British Columbia, Vancouver, BC, Canada
An applet illustrating the behaviour of solutions of the telegraph equation.
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 Anisohedral Tilings Page  John Berglund
Tilings and tessellatings with 2anisohedral and other isohedral tilings. With explanations and a bibliography. Berglund's JavaSketchpad applets include circles in a lattice shape; affine polygons, which extends Napoleon's theorem from a triangle to a
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 Annals of Functional Analysis (AFA)  M. S. Moslehian, EditorinChief
The Annals of Functional Analysis (AFA) is an international electronic journal publishing research papers of high standards and critical survey articles mainly on Functional Analysis (MSC46) and Operator Theory (MSC47).
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 Annenberg Institute for School Reform (AISR)  Brown University
The Annenberg Institute develops, shares and acts on knowledge that improves outcomes of schooling in America, especially in urban communities and in schools serving disadvantaged children. Institute Projects: Rethinking Accountability; Building Capacity;
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 Annie's Sketchpad Activities  Annie Fetter
Handouts for activities that incorporate JavaSketchpad, including: making a presentation sketch; investigating the properties of quadrilaterals; the Euler segment; morphing a simple figure to a circle; Napoleon's theorem; drawing a box and its net; and
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 Ann McCallum Books  Ann McCallum
Lessons and puzzles to extend the math fairytales and history/mystery math project books by McCallum, author of The Secret Life of Math, Rabbits, Rabbits Everywhere: A Fibonacci Sequence, and Eat Your Math Homework: Recipes for Hungry Minds. McCallum's
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 Annotated Bibliography of Software Resources (The Chaos Hypertextbook)  Glenn Elert
An extensive annotated list of software related to Elert's Chaos Hypertextbook. Major categories include: Chaos (Dynamical Systems); Iterated Function Systems (IFS); Lindenmayer Systems; Mandelbrot & Julia Sets; Music; Newton's Method; Terrain &
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 The Annual Maritime Mathematics Competition  Department of Mathematics and Computer Science University of Prince Edward Island, Canada
Consisting of six challenging, high schoollevel math problems requiring written solutions, this competition seeks to foster interest in mathematics, increase public awareness of mathematics, and encourage students to develop mathematical and problemsolving
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 Annual Pi Day  The Exploratorium, San Francisco, CA
"Founded by the the Exploratorium's own Prince of Pi, physicist Larry Shaw, Pi Day has become an international holiday, celebrated live and online all around the world." Read a brief history of pi; find activities for cutting π and wearing π; and
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 Another Record Prime  Ivars Peterson (MathLand)
This time, it didn't take a supercomputer. The new record for the largest known prime number goes to someone using a Pentiumpowered desktop machine. Joel Armengaud, a computer programmer working for Apsylog in Paris, made the discovery on Nov. 13 and
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 Answer Ace  MathSupport Co.
A Windows 95/98/NT math problem solver that helps students learn or review arithmetic, prealgebra, and basic algebra skills. Students enter specific problems and the software provides answers along with stepbystep help. A free trial is available for
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 Answers to Frequently Asked Questions about Principles and Standards for School Mathematics  National Council of Teachers of Mathematics (NCTM)
Why do we need the NCTM Standards? Why did NCTM update its original Standards? What is Principles and Standards for School Mathematics? What makes Principles and Standards for School Mathematics different from the original Standards? What are the Principles?
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 anthropicprinciple.com  Nick Bostrom
A site on 'Anthropic reasoning', which involves concepts such as probability, objective chance, rationality, and observers. See problems like the Doomsday argument.
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 Antiprism  Adrian Rossiter
A set of programs for generating, manipulating, transforming, and viewing models of polyhedra. Open source, via the MIT license.
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 Ant Math (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
Imagine stepping into a pitchblack room. How might you figure out the room's size in the dark? You could, for example, carefully follow the walls and count how many steps you took going from one corner to the next all the way around. That would give
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 AP Analysis of PDEs (Front for the Mathematics ArXiv)  Univ. of California, Davis
Partial Differential Equation preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 apcalc  The College Board, Math Forum
The Advanced Placement Calculus mailing list is hosted by The College Board and archived by the Math Forum. Designed for precollege students preparing for AP tests, the level of discussion and the explicit relation to the college sequence may also make
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 AP Calculus Stillwater  Jim Bowen
Instructional videos narrated by Bowen, who teaches calculus at Stillwater High School (OK), cover limits, derivatives, related rate problems, optimization, integrals and integration, volumes of revolution, and integration by parts.
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 AP Calculus TI 89 Program  Nils Hahnfeld
Calculator program for the TI 89 which animates calculus concepts and computes answers. Covers the entire AP Calculus (AB & BC) curriculum. Screen shots and a list of functions available at the site, as well as documentation.
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 AP Central  The College Board's Online Home for AP Professionals  The College Board
A free site for all those involved in or interested in the AP Program, including new and experienced teachers, coordinators, counselors, college faculty, and school and college administrators, offering a growing set of resources  course descriptions,
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 AP Computer Science  College Board Online
General information about exams and courses (A and AB), links to archives of freeresponse questions in C++, the AP CS mailing list, development committee access, related websites, and an online store for College Board books. Maintained by the College
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 The Aperiodical  Steckles, Katie; Perfect, Christian; and Rowlett, Peter
"A meetingplace for people who already know they like maths and would like to know more." Posts, which date back to February, 2008, have included "Podcast: Episode 2  NoelAnn Bradshaw, Newton and Leibniz"; "9 is an experimental error"; "Wolfram Alpha
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 Apex Learning  Apex Learning
Standardsbased online curriculum for secondary education in the core academic subjects and Advanced Placement, available in multiple formats or packages to address differing purposes and populations: enrichment, credit recovery and remediation, virtual
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