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 Ask Dr. Math FAQ - Math Forum Frequently asked questions from the archives of the Math Forum's question and answer service for K-12 math students and their teachers, with classic problems, formulas, and other recommended math sites. more>> Formulas - Math Forum; Ask Dr. Math FAQ Formulas for: Defining Geometric Figures (plane and solid figures, and a note on dimensions); Geometric Formulas (two- and three-dimensional figures: perimeter, area, volume, etc.); Analytic Geometry Formulas (one, two, and three dimensions: points, directions, lines, triangles, polygons, conic sections, general quadratic equations, spheres, etc.); Polar Coordinates (coordinates, points, directions, translations, rotations, lines, triangles, conic sections); Spherical Coordinates (the three coordinates (rho,theta,phi) of any point); Cylindrical Coordinates (the three coordinates (r,theta,z) of any point); and Trigonometry Formulas (definitions, bounds, identities, triangles, inverse functions, etc.) more>> Frequently Asked Questions in Mathematics - Alex López-Ortiz and the Sci.Math FAQ Team The sci.math FAQ. Non-trivial mathematical trivia from the newsgroup sci.math: a compilation of math history and knowledge of interest to most professional and amateur mathematicians, ranging from advanced topics such as Wiles' proposed proof to Fermat's Last Theorem to the list of Fields Medal winners. Versions available include pages for text-based browsers, graphic browsers, Dvi (TeX) format, PDF format, and PostScript. more>> Geometric Formulas (Ask Dr. Math FAQ) - Math Forum Formulas for two-dimensional figures: triangle (equilateral, isosceles, right, scalene); quadrilateral (general, square, rectangle, parallelogram, rhombus, trapezoid, kite, cyclic and cyclic-inscriptable); regular polygon; circle (arc, segment, sector); ellipse; parabolic segment; and three-dimensional figures: rectangular parallelepiped (cube); prism; pyramid (square pyramid, frustum); regular polyhedron (tetrahedron, cube, octahedron, dodecahedron, icosahedron); cylinder (right circular); cone (right circular, frustum); sphere (sector, cap, segment, zone, lune); ellipsoid; circular torus; spherical polygon. Includes Defining Geometric Figures. more>> Teacher2Teacher (T2T) FAQ - Math Forum Answers to frequently asked questions from the archives of the Math Forum's question and answer service for teachers, with links to T2T discussions, Ask Dr. Math and the Ask Dr. Math FAQ, and relevant resources on the Web. more>>
All Sites - 329 items found, showing 1 to 50
 0! = 1 - Math Forum, Ask Dr. Math FAQ Why does 0! = 1 ? ...more>> 0.9999 = 1 - Math Forum, Ask Dr. Math FAQ Why does 0.9999... = 1 ? An answer adapted from the sci.math FAQ. ...more>> 0 to 0 power - Math Forum, Ask Dr. Math FAQ In calculus, 0^0 is an "indeterminate form"; in some cases we think about it as having one value, and in other cases as having another... ...more>> 1000 Lockers - Math Forum, Ask Dr. Math Common Question A selection of answers to the "locker problem": "There are 1000 lockers in a high school with 1000 students. The problem begins with the first student opening all 1000 lockers; next the second student closes lockers 2,4,6,8,10 and so on to locker 1000; ...more>> 100th Day of School - Math Forum, Teacher2Teacher FAQ Answers to a frequently asked question: What can I do to celebrate 100th Day? ...more>> about dyscalculia - Anna Wilson Information about dyscalculia "from the research community to parents, teachers, policy makers, and people affected by dyscalculia." Read a definition of this math learning disability, as well as causes, symptoms, and diagnosis. FAQ for teachers and parents ...more>> About Ellipses - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about ellipses, such as calculating their areas and perimeters, graphing them, and determining equations for them. ...more>> About e - Math Forum, Ask Dr. Math FAQ What is e? Who first used e? How do you find it? How many digits does it have? e = 2.71828... and is the base of natural logarithms. ...more>> About Proofs - Math Forum, Ask Dr. Math FAQ What is a proof? How do you write a two-column proof? ...more>> About Zero - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about zero, such as whether it is even or odd, prime or composite, positive or negative, and different from nothing. ...more>> Absolute Value - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about absolute value, such as real-life applications, its place in order of operations, and solving algebra inequalities that contain absolute values. ...more>> Adding/Subtracting Fractions - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about adding and subtracting fractions, including how to find common denominators. ...more>> Algebra Help - Math Forum, Teacher2Teacher FAQ Answers to a frequently asked question: How do I help students learn algebra? ...more>> Algebraic Structures - Alex López-Ortiz and the Sci.Math FAQ Team Brief explanations of the following concepts: N is a monoid; Z is an integral domain; Q is a field; in the field R the order is complete; the field C is algebraically complete ...more>> Amazing Math Tutor San Diego - Sam Mirs One-on-one in-home tutoring for algebra, trigonometry, geometry, pre-calculus, calculus and college math students in San Diego county. Blog posts, which date back to January, 2013, have included "The 7 Steps to Succeed in Math Tests," "The 3 main Questions ...more>> Analytic Geometry: Cylindrical Coordinates (Ask Dr. Math FAQ) - Math Forum A discussion of cylindrical coordinates and their common uses. ...more>> 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, ...more>> 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. ...more>> 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. ...more>> Analytic Geometry: Spherical Coordinates (Ask Dr. Math FAQ) - Math Forum A discussion of spherical coordinates and their common uses. ...more>> 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. ...more>> 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. ...more>> AP Statistics Listserv FAQ - Kim Robinson, Jared Derksen, Dan Teague Frequently Asked Questions site for the AP Statistics listserv discussion. Includes information for new AP Stats teachers, course content, exam details, and other resources. ...more>> Art and Mathematics - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about art and mathematics, such as "Do you know ways that art can be linked to mathematics?" ...more>> Artificial Intelligence Resources - NRC - National Research Council (NRC) of Canada Internet resources useful to AI researchers: Archives for newsgroups and mailing lists; bibliographies; books; companies; conferences; employment opportunities; FAQs; journals; location index (various AI research groups, organized geographically); list ...more>> Ask-A-Scientist Archives - Newton BBS, Argonne National Laboratory Frequently asked astronomy, biology, chemistry, computer science, engineering, environmental, general, physics, and mathematics question posts, replies from NEWTON, an Electronic Bulletin Board System (BBS) for Science, Math, and Computer Science K-12 ...more>> Assessment Suggestions - Math Forum, Teacher2Teacher FAQ Answers to a frequently asked question: How can I assess my students at the beginning of the year? Mid-year? Throughout the year? ...more>> Asymptotes - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about asymptotes, such as "What are the vertical and horizontal asymptotes of f(x)?" ...more>> BetterExplained - Kalid Azad Discover and share the "intuitive insights that make complicated ideas simple. Our 'ah-ha!' moments are different, and that's ok. There's no single way to explain an idea...." Preferring the construction of maps over the memorization of directions, the ...more>> A Better Mathematics Curriculum - Tom Davis; Math Forum, Ask Dr. Math FAQ What should we be teaching students today? Dr. Tom provides his take on what would make a better math curriculum. ...more>> The Birthday Problem - Math Forum, a Classic Problem from the Ask Dr. Math FAQ What if somebody offered to bet that at least two people in your math class had the same birthday? Would you take the bet? How large must a class be to make the probability of finding two people with the same birthday at least 50%? ...more>> Borrowing/Regrouping - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about borrowing, regrouping, and carrying, such as "When doing subtraction problems like 100-99, why do the zeros become nines?" and "When you are subtracting a fraction, do you always take one away from the whole number?" ...more>> The Calendar and the Days of the Week - Math Forum, Ask Dr. Math FAQ What years are leap years? What day of the week will it be a year from today? How do I find the day of the week for any date? How do I find a calendar for any year? How common are Friday the 13ths? ...more>> Casting Out Nines - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about casting out nines, including proofs of why the method works. ...more>> Celsius to/from Fahrenheit - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about converting Celsius to and from Fahrenheit, such as "Is there a temperature that is the same on both the Celsius and Fahrenheit scales?" ...more>> Chain Rule - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about the chain rule, such as when to use it and why. ...more>> Challenges - RSA Security Read about three cryptographic challenges: RSA Factoring Challenge, Secret-Key Challenge, and DES Challenge III. For the solution of these cryptographic challenges, RSA offers cash prizes as "... modest rewards for some of the hard work that goes into ...more>> Circle Formulas (Ask Dr. Math FAQ) - Math Forum Formulas for finding the area, perimeter, arc, segment, or sector of a circle. ...more>> Circle Formulas - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about circle formulas, including how to find their circumferences and areas. ...more>> Circles - 360 Degrees - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about why a circle has 360 degrees, and the origin of that degree measurement. ...more>> Circumference of an Ellipse (Ask Dr. Math FAQ) - Math Forum A discussion of the derivation of the formula for the circumference of an ellipse. Also discussions of the evaluation of the formula, and approximating the circumference. ...more>> Classic Problems - Math Forum; Ask Dr. Math FAQ Classic problems from the Ask Dr. Math FAQ (Frequently Asked Questions) files, including: age word problems, birthday probability, boy or girl?, camel and bananas, coin problems, doubling pennies, grazing animals, liars and truthtellers, the missing dollar, ...more>> Classifying Numbers - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about classifying numbers, such as "How are the different types of numbers related?" and "What is a real number?" ...more>> Cmathématique - Téléfiction Liens à consulter classés par sujet et par niveau; des problèmes du mois, un concours pour l'honneur dont les meilleures solutions de participants seront publiées sur le site; des capsules "crack" mathématiques offrant ...more>> Coin Flipping - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about flipping coins, such as "What is the probability of getting two heads and four tails?" and "What is the probability of getting two heads on four flips of an unbiased coin?" ...more>> Comparing Fractions - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about comparing fractions, putting them in order, and defining equivalent fractions. ...more>> Completing the Square - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about completing the square, with diagrams, geometry, and alternate methods. ...more>> Composition of Functions - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about composition of functions, including evaluating them and determining the domain of a composite function, ...more>> Computational Geometry - Joseph O'Rourke Computational Geometry is concerned with designing algorithms and computer programs to perform geometric computations. A need for such computations arises in many fields: computer graphics, robotics, pattern recognition, geography, manufacturing, etc. ...more>> Computational Geometry Resources - School of Computer Science, Carleton Univ., Ottawa, Ontario, Canada A comprehensive listing of computational geometry resources on the Internet, including: Indexes; Centres in North America, Europe, and Australasia; Literature; Newsgroups, FAQs, and Newsletters; Software libraries; and other miscellaneous sites. ...more>>
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