Here's an interesting question which is related to proofs, one of the hardest chapters of math:(adsbygoogle = window.adsbygoogle || []).push({});

If a circle can be drawn to pass through the 4 vertices of a Quadrilateral, we call this a "cyclic quadrilateral". What special properties do you think a cyclic quadrilateral has that wouldn't be true for any other quadrilateral?

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# Good question

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