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2315. A single-scale nomogram

Published online by Cambridge University Press:  03 November 2016

Richard K. Guy
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Abstract

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Type
Mathematical Notes
Information
The Mathematical Gazette , Volume 37 , Issue 319 , February 1953 , pp. 39
Copyright
Copyright © The Mathematical Association 1953

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References

page no 55 note * Vol. 34 (1950), note 2144, pp. 129–133.

page no 56 note * We use here the convention that θ is to be measured in the positive (anti-clock¬wise) sense about A from AB (though the line through A may well lie outside the triangle, and θ need not be restricted to lie in the range 0≤θ<2π), and similarly for φ, ψ. The senses of the lines are, of course, irrelevant, since (2) is unaltered if we increase any of the angles θ, φ, ψ by π (or, indeed, by any multiple of π), while the condition of concurrency is also unaffected.