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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

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A Rapidly Converging Recursive Approach to Pi.
Peer reviewed Peer reviewed
Dence, Joseph B.; Dence, Thomas P. – Mathematics Teacher, 1993
Presents an algorithm to estimate pi by approximating a unit circle with a sequence of inscribed regular polygons. Demonstrates the application of the algorithm with a hand-held calculator and an Apple computer. Provides a program to calculate pi in Pascal programing language. (12 references) (MDH)
Descriptors: Algorithms, Area, Calculators, Computation
Calculating PI Using Historical Methods and Your Personal Computer.
Peer reviewed Peer reviewed
Mandell, Alan – Journal of Computers in Mathematics and Science Teaching, 1989
Provides a software program for determining PI to the 15th place after the decimal. Explores the history of determining the value of PI from Archimedes to present computer methods. Investigates Wallis's, Liebniz's, and Buffon's methods. Written for Tandy GW-BASIC (IBM compatible) with 384K. Suggestions for Apple II's are given. (MVL)
Descriptors: Computer Oriented Programs, Computer Software, Computer Uses in Education, Courseware
Archimedes and Pi.
Peer reviewed Peer reviewed
Shilgalis, Thomas W. – Mathematics Teacher, 1989
Discusses a calculation method to approximate pi. Describes how to get an approximation to the circumscribed and inscribed perimeters of regular polygons of n sides. Presents the computer program and result of the approximation. (YP)
Descriptors: College Mathematics, Computation, Computer Software, Geometric Concepts