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67.38 The central angle of the regular 17-gon
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- Journal:
- The Mathematical Gazette / Volume 67 / Issue 442 / December 1983
- Published online by Cambridge University Press:
- 22 September 2016, pp. 290-292
- Print publication:
- December 1983
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53. Ptolemy's Theorem by Area Formulae
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- Journal:
- The Mathematical Gazette / Volume 44 / Issue 348 / May 1960
- Published online by Cambridge University Press:
- 03 November 2016, p. 112
- Print publication:
- May 1960
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