By Lennart Berggren

Pi is without doubt one of the few strategies in arithmetic whose point out conjures up a reaction of popularity and curiosity in these now not involved professionally with the topic. but, regardless of this, no resource booklet on Pi has ever been released. Mathematicians and historians of arithmetic will locate this e-book integral. lecturers from the 7th grade onward will locate plentiful assets for whatever from specific subject classes to person talks and particular pupil initiatives.

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According to a sequence of lectures for grownup scholars, this vigorous and unique booklet proves that, faraway from being a dusty, uninteresting topic, geometry is in reality choked with attractiveness and fascination. The author's infectious enthusiasm is placed to exploit in explaining a few of the key techniques within the box, beginning with the Golden quantity and taking the reader on a geometric trip through Shapes and Solids, throughout the Fourth size, completing with Einstein's Theories of Relativity.

Pi is among the few recommendations in arithmetic whose point out inspires a reaction of popularity and curiosity in these no longer involved professionally with the topic. but, regardless of this, no resource e-book on Pi has ever been released. Mathematicians and historians of arithmetic will locate this booklet critical.

Derived from a different consultation on Low Dimensional Topology prepared and carried out via Dr Lomonaco on the American Mathematical Society assembly held in San Francisco, California, January 7-11, 1981

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Bai Shangshu lap]. 1982. Cong Wang Mang liang qi dao Liu Xin yuan lu [cr] [From Wang Mang's measuring vessel to Liu Xin's ratio of circumference to diameter]. 2, 75-79. - - - 1983. Jiu zhang suanshu zhushi [cs] [Annotations on Nine chapters of the mathematical art]. Beijing: Kexue chubanshe. 33 HM 13 CIRCLE MEASUREMENTS 339 Beckmann, P. 1970. A history of 7T (pi). : Golem, 1971. Gupta, R. C. 1975. Some ancient values of pi and their use in India. Mathematics Education 9, 1-5. He Shaogeng [bbl. 1983.

8. For an objective review of the polemic of this problem, see [Li Di 1982, 35-44]. 9. For a brief biography of Zu Chongzhi, see [Li Di 1962]. See also [Ruan Yuan 1799353,91-105]. 10. See [Qian 1923, 59; Yan 1936b, 43; Sun 1955, 9]. II. For a brief survey of this period, see [Xu 1957, 48]. 12. Thc diagram is missing, but it should be similar to Fig. I. 13. For the square-root extraction procedure, see [Wang & Needham 1955, 350-356; Lam 1969, 93-97]. REFERENCES Ang Tian Se. 1977. Chinese computation with the counting-rods.

This is why half the circumference multiplied by the radius is the area of the circle. The relation of circumference and diameter considered in this manner gives the most satisfactory result. The ratio of circumference to diameter is in fact not 3 to I. The figure 3 attached to the circumference actually means that the perimeter of an inscribed hexagon is three times the diameter. , 3] is used to compute the length of an arc, the result obtained is not the arc but the chord. The value of this ratio was, however, passed on from generation to generation indicating the reluctance of the people to strive for accuracy.