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An octet of circles

Published online by Cambridge University Press:  02 November 2015

Michael Sewell
Michael Sewell*
Affiliation:
University of Reading, Whiteknights, Reading RG6 6AX, e-mail: michael@sewells.org
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Type
Articles
Information
The Mathematical Gazette , Volume 99 , Issue 546 , November 2015 , pp. 468 - 473
Copyright
Copyright © Mathematical Association 2015

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References

1. Pickover, C. A., The Math Book, Sterling, New York (2009).Google Scholar
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3. Bogomolny, A., 3 circles having the same radius, Cut-the-knot (2015), available at: http://www.cut-the-knot.org/proofs/3circlesFormal.shtml Google Scholar
4. Bogomolny, A., Orthocenter and three equal circles, Cut-the-knot (2015), available at: http://www.cut-the-knot.com/Curriculum_Geometry/EqualCirclesOrthocenter.shtml Google Scholar
5. Mackenzie, D. N., Triquetras and Porisms, The College Mathematics Journal 23 (March 1992) pp. 118–131, available at http://www.maa.org/sites/default/.les/pdf/uploadlibrary/22/Polya/07468342.di020751.02p00864.pdf Google Scholar
6. Wikipedia, Johnson circles (2014) available at http://en.wikipedia.org/wiki/Johnson_circles Google Scholar