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93.32 The area of a quadrilateral

Published online by Cambridge University Press:  01 August 2016

Douglas W. Mitchell
Douglas W. Mitchell*
Affiliation:
428 Wind Haven Lane, Winston-Salem, NC 27104USA
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Information
The Mathematical Gazette , Volume 93 , Issue 527 , July 2009 , pp. 306 - 309
Copyright
Copyright © The Mathematical Association 2009

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References

1. Weisstein, E.W., Bretschneider’s formula, from Math World-A Wolfram Web Resource. http://mathworld.wolfram.com/BretschneidersFormula.html Google Scholar
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3. Johnson, R.A., Advanced Euclidean Geometry, 2007 (Dover) (republication of 1st edition, 1960, Houghton Mifflin Co.).Google Scholar
4. Harries, J., Area of a quadrilateral, Math. Gaz. 86 (July 2002) pp. 310–311.Google Scholar
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6. Siddons, A.W. and Hughes, R.T., Trigonometry, 1929 (C.U.P.).Google Scholar