21. Riverdeep | Tangible Math | Geometry Inventor | Circles And Pi Unit, geometry Inventor. Activity, Circles and pi, http://www.riverdeep.net/math/tangible_math/tm_activity_pages/geometry_inventor/

Elementary (PreK-6) Middle School (6-9) High School (9-12) Destination Math ... edConnect To find support materials for Tangible Math activities, including lesson plans and student handouts, you will first need to select a Tangible Math unit using the tabs below and then a specific activity listed underneath. Product Tangible Math Unit Geometry Inventor Activity Circles and Pi Overview Students: Show that a circle is the path of a point moving so that it is a fixed distance from a fixed point. Show that a circle divides a plane into three regions: inside, on, and outside the circle. Show that pi is the ratio circumference/diameter and that it is a constant equal to ~3.14. Privacy Policy Terms and Conditions Math Science ... Contact Us

22. LycosZone Directory > Homework > Math > Geometry And Trigonometry > Pi discussions of pi, including its history, related literature, records, how to computeit, etc. Grade Level 912, or you can Check out other geometry and http://www.lycoszone.com/dir/Homework/Math/Geometry and Trigonometry/Pi/

Search For: Lycos Zone Home Family Zone Teachers Zone What kind of Pi Websites are you looking for? Fun with PI This page contains some methods to calculate PI to a lot of decimals. It also contains some programs you can use to try it yourself. Grade Level: 9-12 The Pi Pages "Extremely comprehensive discussions of pi, including its history, related literature, records, how to compute it, etc." Grade Level: 9-12 Check out other "Geometry and Trigonometry" Web Pages! Go To Top of Directory Back to Lycos Zone! Lycos Worldwide ... Lycos Zone Privacy Statement

23. Math Forum - Ask Dr. Math Archives: Middle School Pi Approximating pi using geometry 08/12/1998 I need to know a simple methodto find the approximate value of pi using elementary geometry. http://mathforum.org/library/drmath/sets/mid_pi.html

Ask Dr. Math Middle School Archive Dr. Math Home Elementary Middle School High School ... Dr. Math FAQ TOPICS This page: pi Search Dr. Math See also the Dr. Math FAQ Pi = 3.14159... Internet Library pi T2T FAQ pi day MIDDLE SCHOOL About Math Algebra equations factoring expressions ... Word Problems Browse Middle School Pi Stars indicate particularly interesting answers or good places to begin browsing. Accuracy in Measurement Since pi is irrational, either the circumference or the diameter of a circle must be irrational. How is that possible? Calculating Pi - Brent-Salamin Algorithm Can you show me a simple method to calculate pi accurately to an arbitrary number of digits? Facts about Pi What are some interesting facts about pi? Finding Pi: Buffon's Needle Method I was hoping to find a surprising way of finding pi using a needle and parallel lines... Formula for Pi I would like to know the formula for Pi that was used to calculate out to the bazillionth digit for the memory contests. Pi and the Area of Circles If pi truly goes on and on forever without repeating, is it impossible to find the exact area of a circle?

24. Math Forum - Ask Dr. Math I need to know a simple method to find the approximate value of pi usingelementary geometry. Drexel Approximating pi using geometry. Date http://mathforum.org/library/drmath/view/55034.html

Associated Topics Dr. Math Home Search Dr. Math Approximating Pi using Geometry http://mathforum.org/dr.math/ Associated Topics High School Conic Sections/Circles High School Geometry High School Triangles and Other Polygons Middle School Conic Sections/Circles ... Middle School Triangles and Other Polygons Search the Dr. Math Library: Find items containing (put spaces between keywords): Click only once for faster results: [ Choose "whole words" when searching for a word like age. all keywords, in any order at least one, that exact phrase parts of words whole words Submit your own question to Dr. Math Math Forum Home Math Library Quick Reference ... Math Forum Search Ask Dr. Math TM http://mathforum.org/dr.math/

25. InterMath | Investigations | Geometry to About InterMath Click to go to Contact Us Sitemap nav Search the Site Investigations geometry Circles Additional Investigations Rationalize pi It is http://www.intermath-uga.gatech.edu/topics/geometry/circles/a13.htm

Search the Site Investigations Geometry Circles ... Additional Investigations It is possible to approximate pi with a rational number. Let's play a game where you try to approximate pi to 4 decimal places using an expression of integers (decimals not allowed) with a fraction, exponent, or combination of the two. The goal will be to get the lowest score possible. Here's how you keep score: +1 for each digit used, and +0.2 for each ten-thousandth that you are away from the actual value of pi (= 3.1416, to the nearest 4 decimal places.) For example, 314/100 is equal to 3.14; your score would be +6 for using six digits and +3.2 for being 16 ten-thousandths away from pi, giving a total of +9.2. Another example is ; your score would be +3 for using three digits and +37.8 for being 189 ten-thousandths away from pi. What is the lowest score you can find? Submit your idea for an investigation to InterMath

26. InterMath | Investigations | Geometry the value of pi Estimation of pi *Joy of pi *FAQ about pi. Other *Venn diagrams*Circles in geometry *Designs with circles *Erich's packing center *geometry http://www.intermath-uga.gatech.edu/topics/geometry/circles/links.htm

Search the Site Investigations Geometry Circles External Resources Lessons, Activities, and Units Area Area of a circle Approximate the area of a circle using inscribed regular polygons Area of a circle by Jon Basden Area of a circle by Edwina Justice ... Relationship Between Circumference and area Circumference and pi Pimathematics page How to make pi with Geometer's Sketchpad Why pi? Circumference of a circle by Mrs. Glosser ... FAQ about pi Angles Circle angles with Geometer's Sketchpad The coffee cup caustic Segments Chord segments using technology Circumferences, diameter and radii Other Venn diagrams Circles in geometry Designs with circles Erich's packing center ... Spirograph (java) Literature Flatland, by Edwin A. Abbott, is a story about two-dimensional "creatures" (triangles, squares, other polygons, and circles) that live on a plane. Problem Solving Area Harvest moon problem Puzzle pie He ate it all! Circles and semicircles ... Carefully cutting cloth Circumference and pi Peanut's backyard Equal area and perimeter of a square and a circle?

27. MID-ATLANTIC GEOMANCY: Sacred Geometry 3 pi (3.1416 1) is found in any circle. In sacred geometry, the circlerepresents the spiritual realms. A circle, because of that http://www.geomancy.org/sacred_geometry/sacgeo-2.html

- Pi - 3.1416 : 1 - the Circle The Circle: Radius (CD) = 1 Diameter (AB) = 2 Circumference = pi (3.1416) x Diameter Pi (3.1416 : 1) is found in any circle. In sacred geometry, the circle represents the spiritual realms. A circle, because of that transcendental number pi , cannot be described with the same degree of accuracy as the physical square. The circle is yin It is a good shape to do all kinds of spiritual activities in. It is good for groups to work in circles. There are many examples of sacred spaces that are circular. Ring of Brodgar, Mainland Orkney. Most stone rings in the British isles are not actually circular. Dr Alexander Thom proved this with his pioneering work in the sixties. Some of the true circles are Merry Maidens in Cornwall, Stonehenge and the Ring of Brodgar.

28. Three-dimensional Solid Geometry And The Golden Section The online book is worth browsing thorugh as it has lots more interesting geometryabout space The angles in the rhombs in the Penrose tiling are 2/5 pi and 3 http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/phi3DGeom.html

Some Solid (Three-dimensional) Geometrical Facts about the Golden Section Having looked at the flat geometry (two dimensional) of the number Phi, we now find it in the most symmetrical of the three-dimensional solids - the Platonic Solids. Contents of this Page The line means there is a Things to do investigation at the end of the section. Phi and 3-dimensional geometry From 2-dimensional (flat) shapes, we turn to 3-dimensional ones (solids). Dice Shapes We need symmetry in dice if they are to be fair, but is the cube the only possible shape? No, there are 5 and only 5 fair dice shapes: Coordinates and other statistics of the 5 Platonic Solids The Tetrahedron The Cube or Hexahedron The Octahedron ... The Icosahedron Some other relationships between these shapes... The Dual of a Solid Golden sections in the Dodecahedron, Icosahedron and Octahedron An Icosahedron in an Octahredron The Greeks, Kepler and the Five Elements solids ... More Phi and 3-dimensional geometry The five regular solids (where "regular" means all sides are equal and all angles are the same and all the faces are identical) are called the five Platonic solids after the Greek philosopher and mathematician, Plato. Euclid also wrote about them. For more information on these two famous Greeks, see the

29. Pi In The Sky-Geometry This is our geometry information center. Yes, if you have just arrived,it is somewhat empty! But we have only just put it up and http://www.piinthesky.com/geometry.html

This is our geometry information center. Yes, if you have just arrived, it is somewhat empty! But we have only just put it up and we can assure you it will be soon expanding, geometrically!, into an information resource, not only on the background to the products we sell, but also with information about basic principles and more complex formations. Come back soon! home contact products resources ... geometry

30. Our Geometry/Pi Page Definitions of geometry Terms*. *Postulates*. *Theorems*. *pi*. *Examples ofHow To Do geometry Problems*. TRIGONOMETRY. *Definitions of Trigonometry Terms*. http://www.geocities.com/houseman_christina/

HOUSE OF Pie Pi!!! Welcome one and all to our Gee-I'm-A-Tree (geometry) and Trigonometry page. This is where you can get a list of Gee-I'm-A-Tree and Trigonometry postulates, theorems, laws, etc. Oh, and of course, plenty of Pi... enjoy! Here are the links to the rest of our pages: GEOMETRY *Definitions of Geometry Terms* *Postulates* *Theorems* *Pi* ... *Examples of How To Do Geometry Problems* TRIGONOMETRY *Definitions of Trigonometry Terms* *Examples of How To Do Trigonometry Problems* Other Helpful Websites: *Introduction to Geometry* *Geometry Formulas and Facts* *Euclidian Axioms and Theorems* *Trigonometry and Astronomy* Need some help with your homework? Click here to send us your math question and/or suggestions! click on the arrow to go to the next page

31. Knowledge-Mathematic-Geometry-Pi.page pi. What is pi? Meh, still to busy. pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998280348253421170679 http://www.geocities.com/ultrastupidneal/Knowledge-Mathematic-Geometry-Pi.html

Pi What is pi? Meh, still to busy. I'll explain some other day. Pi = 3.1415926535897932384626433832795028841971693993751 Unfortunately those are the first 100 digits. I can put more, when I get a little done with all my fields. I don't think I'll ever want to put more than a thousand in the history of my site, as when some of you as my site dependers really need at least that much, you will have to E-mail me at LonelyNoone@Hotmail.com . As of now, I plan on putting in to 200, or maybe 100 at a time. Geometry Well, here's the first 1,000 digits of pi, and I made it in a larger font. Q:Yo SiteMaster, your site about pi is crappy, I could easily find even more digits of pi anywhere! What? You ave the first 10, 20, 50, and even a hundred, as well as a thousand? I could easily find 2 thousand, 5,000 and even 10 thousand anywhere! Your site's last on my list! A: Link

32. AVirtualSpaceTimeTravelMachine : DETERMINISTIC FRACTAL GEOMETRY PICTURE (IMAGE D 2 pi rotation about Y and Z axes of a quaternionic Julia set rotation de 2 piautour des axes Y et Zd'un ensemble de Julia dans le corps des quaternions. http://www.lactamme.polytechnique.fr/Mosaic/images/JU.b1.16.D/display.html

2 pi rotation about Y and Z axes of a quaternionic Julia set [ rotation de 2 pi autour des axes Y et Z d'un ensemble de Julia dans le corps des quaternions (mpg=368.KB). Some beautiful points of view from this rotation: (this picture was created on 05/23/1995) (this page -belonging to the CMAP28 site- was last updated on 03/19/2003 13:45:04 -CET-) [Go back to AVirtualSpaceTimeTravelMachine [ Retour a AVirtualSpaceTimeTravelMachine [The Y2K bug [ Le bug de l'an 2000 ... Courrier

33. ThinkQuest Library Of Entries Volume Formula V = (4/3)(pi)r 3 Area Formula A = 4(pi)r 2. Math for Morons LikeUs geometry Area and Volume of Solids /20991/geo/solids.html © 1998 http://library.thinkquest.org/20991/geo/solids.html

Welcome to the ThinkQuest Internet Challenge of Entries The web site you have requested, Math for Morons like Us , is one of over 4000 student created entries in our Library. Before using our Library, please be sure that you have read and agreed to our To learn more about ThinkQuest. You can browse other ThinkQuest Library Entries To proceed to Math for Morons like Us click here Back to the Previous Page The Site you have Requested ... Math for Morons like Us click here to view this site A ThinkQuest Internet Challenge 1998 Entry Click image for the Site Languages : Site Desciption Have you ever been stuck on math? If it was a question on algebra, geometry, or calculus, you might want to check out this site. It's all here from pre-algebra to calculus. You'll find tutorials, sample problems, and quizzes. There's even a question submittal section, if you're still stuck. A formula database gives quick access and explanations to all those tricky formulas. Languages: English. Students J. Robert Davis High School Library UT, United States

34. ThinkQuest Library Of Entries geometry Reference. Formulas for Area of Polygons. RECTANGLE l*w; SQUARE- s*s; TRIANGLE - 1/2 * (b*h); CIRCLE - (pi) * r * r; PARALLELOGRAM - b *h; http://library.thinkquest.org/2609/refer.htm

Welcome to the ThinkQuest Internet Challenge of Entries The web site you have requested, Introduction to Geometry , is one of over 4000 student created entries in our Library. Before using our Library, please be sure that you have read and agreed to our To learn more about ThinkQuest. You can browse other ThinkQuest Library Entries To proceed to Introduction to Geometry click here Back to the Previous Page The Site you have Requested ... Introduction to Geometry click here to view this site A ThinkQuest Internet Challenge 1996 Entry Click image for the Site Languages : Site Desciption This is a tutorial in introductory concepts of geometry. It is divided into four lessons to teach these basic skills: Terminology, Theorems and Proofs, Triangles and their Special Properties, and Graphing Points and Lines. Take the test to see what you have learned. You'll find the reference page and its formulas to be a helpful tool. Students Matt Jenifer Junior High School ID, United States Chad Clarkston High School WA, United States Joe Jenifer Junior High School ID, United States

35. Mathematics.Geometry & Trigonometry - ChatArea.com rino_2 Total Posts 8 Profile Reply, How to calculate pi posted on 8/28/200225916 PM Hello. how did they calculate pi to so many places? http://www.chatarea.com/Mathematics.m86467

Advertise above for as low as $8.00 a month! Your Mathematics Forum Your Electronics Forum Your Science Forum Reply New Topic ... Register Author Message / Information Live Posts: 8 Contributed Posts: 8 Profile Reply How to calculate PI posted on: 8/28/2002 2:59:16 PM Hello. A day or two ago I read (i think on this fourm) that some guys calulated PI to a million decimal places or something. This has me thinking, how on earth was this done? I don't really understand PI, just that its a ratio between the circumfrence and the diameter of a circle (in fact i dont even know if thats right so how was it done? how did they calculate PI to so many places? CindyM Live Posts: 5 Contributed Posts: 5 Profile Reply Re: How to calculate PI replied on: 8/28/2002 6:46:38 PM http://dir.yahoo.com/Science/Mathematics/Numerical_Analysis/Numbers/Specific_Numbers/Pi/ This webpage has links to information about Pi and how it is calculated. Bugs Suggestions How To? News ... Advertising Powered By ChatArea.com - Get your free Society today! Advertise above for as low as $8.00 a month!

36. ProTeacher! Geometry And Measurements Lesson Plans For Elementary School Teacher to help celebrate pi Day (3/14) source. Shapes, Lines, Angles, and Quilts Alesson idea with directions and web links for teaching about the geometry of http://www.proteacher.com/100021.shtml

[Click Here] to search tens of thousands of ideas on ProTeacher's new Teaching Ideas Archive Math Shapes Measurement ... Math Board - Share you ideas, strategies, and questions for making math instruction effective and meaningful for students. source A Fractals Unit for Elementary and Middle School Students - An instructional units about the geometry of fractals. Pictures, information, and handouts are provided source Angles - A clear introduction to the basic terminology of angles and a practice exercise using a compass source Angles - Students practice using a protrcator to measure angles on this printable worksheet source Circles Worksheet - A printable worksheet about circles. Questions include radius, diameter, and circumference source Congruency - A worksheet that directs students to use a grid to draw congruent shapes source Design and Math - Three lesson plans use real world examples to teach geometric concepts about angles, symmetry, and the quadratic formula source Draw What You See - An activity with a reproducible worksheet for drawing three dimensional objects on a two dimensional plane. Designed for use with Snap Cubes, but adaptable source Film Canister Kaleidescope - A lesson plan for teaching about geometric symmetry by creating a kaleidescope from recycled materials source Geometric Coloring Sheet - A reproducible full of repeated, symmetrical patterns of triangles and squares

37. SchoolOnLine.Org - Math/Geometry: What Is Pi? What is pi? (sounds like pie ) pi is the answer to the questionWhat is the distance around a circle? What is the value of pi? http://www.schoolonline.org/Math/Geometry/pi.html

What is Pi? (sounds like "pie") Pi is the answer to the question: What is the distance around a circle? d symbolizes the distance across the circle. d multiplied by PI equals the distance around the circle. The value of PI is about 3.14159. If you took enough string to measure around the circle exactly one time, the length of the string would be approximately d x 3.14159 PI is used to symbolize the measurement of the distance around a circle. What is the value of Pi? The value of PI is about 3.14, or a little more than 3. Pi has been figured out to over 50 decimal places. However, most accurate measurements can be handily made with just a few decimals places, such as 3.1415926. The actual number is unknown, because Pi is not a rational number Pi is the 16th letter of the Greek Alphabet. Main fact: If you take the distance across a circle and multiply it by PI, you get the distance around the circle. Definitions The distance across a circle is called the diameter The distance around a circle is called the circumference The diameter multiplied by Pi equals the circumference

38. Space Figures And Basic Solids If L is the length of a cylinder, and r is the radius of one of the bases of a cylinder,then the volume of the cylinder is L × pi × r 2 , and the surface http://www.mathleague.com/help/geometry/3space.htm

Space figures and basic solids Space figures Cross-section Volume Surface area ... Math Contests School League Competitions Contest Problem Books Challenging, fun math practice Educational Software Comprehensive Learning Tools Visit the Math League Space Figure A space figure or three-dimensional figure is a figure that has depth in addition to width and height. Everyday objects such as a tennis ball, a box, a bicycle, and a redwood tree are all examples of space figures. Some common simple space figures include cubes, spheres, cylinders, prisms, cones, and pyramids. A space figure having all flat faces is called a polyhedron. A cube and a pyramid are both polyhedrons; a sphere, cylinder, and cone are not. Cross-Section A cross-section of a space figure is the shape of a particular two-dimensional "slice" of a space figure. Example: The circle on the right is a cross-section of the cylinder on the left. The triangle on the right is a cross-section of the cube on the left. Volume Volume is a measure of how much space a space figure takes up. Volume is used to measure a space figure just as area is used to measure a plane figure. The volume of a cube is the cube of the length of one of its sides. The volume of a box is the product of its length, width, and height.

39. Piguy 's Math Javascripts Page This page has dozens of math calculators, making all sorts of math, from algebra to arithmetic to geometry, easier. Also, 50,000 decimals of pi and a logarithm table. http://www.geocities.com/CapeCanaveral/Hall/1216/

Click above for more info about making money surfing... by the way, I have PROOF that you actually get paid piguy's Math Page Search this page! This search engine hasn't been working that well, so if you don't get good results, you aren't alone. It will be fixed soon (hopefully). Howdy! Thanks for coming to my web page. I am working on getting more stuff, but it is a slow process. JavaScript Things Logarithm Stuff Links Math Forum ... Webrings If you have any kind of complaint, comment, or hint, Please and let me know. Don't forget to sign my guestbook! Have a good Day! Take my poll! Click here to vote for other things. My website quality check How good is this website Totally, 100% AWESOME !!! If I liked Math, It would be pretty cool Decent, not great, but pretty good Not very good, needs work, probably in bottom 30% of websites Where in the world did you learn how to make a website?!?! Current Results FastCounter by LinkExchange people have visited this Math page since Sept. 18th, 1998 Sorry, you do not have a javascript compatible browser. You will not be able to see the beauty of this website. Find out about me and my family by clicking here

40. Area And Perimeter Area of a Circle. The area of a circle is pi × r 2 or pi × r × r, where r is thelength of its radius. pi is a number that is approximately 3.14159. Example http://www.mathleague.com/help/geometry/area.htm

Area and perimeter Area Area of a square Area of a rectangle Area of a parallelogram ... Math Contests School League Competitions Contest Problem Books Challenging, fun math practice Educational Software Comprehensive Learning Tools Visit the Math League Area The area of a figure measures the size of the region enclosed by the figure. This is usually expressed in terms of some square unit. A few examples of the units used are square meters, square centimeters, square inches, or square kilometers. Area of a Square If l is the side-length of a square, the area of the square is l or l l Example: What is the area of a square having side-length 3.4? Area of a Rectangle The area of a rectangle is the product of its width and length. Example: What is the area of a rectangle having a length of 6 and a width of 2.2? Area of a Parallelogram The area of a parallelogram is b h , where b is the length of the base of the parallelogram, and h is the corresponding height. To picture this, consider the parallelogram below: We can picture "cutting off" a triangle from one side and "pasting" it onto the other side to form a rectangle with side-lengths

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