# Four Concurrent Lines in a Cyclic Quadrilateral

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A cyclic quadrilateral has all four of its vertices on a circle.

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Contributed by: Jay Warendorff (March 2011)

After work by: Alexander Bogomolny

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

A. Bogomolny, "Four Concurrent Lines in a Cyclic Quadrilateral," *Interactive Mathematics Miscellany and Puzzles*.

## Permanent Citation

"Four Concurrent Lines in a Cyclic Quadrilateral"

http://demonstrations.wolfram.com/FourConcurrentLinesInACyclicQuadrilateral/

Wolfram Demonstrations Project

Published: March 7 2011