• Corpus ID: 124622186

On the Diagonals of a Cyclic Quadrilateral

@inproceedings{Alsina2007OnTD,
  title={On the Diagonals of a Cyclic Quadrilateral},
  author={Claudi Alsina and Roger B. Nelsen},
  year={2007}
}
We present visual proofs of two lemmas that reduce the proofs of expressions for the lengths of the diagonals and the area of a cyclic quadrilateral in terms of the lengths of its sides to elementary algebra. 

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