## Definitions

### from Wiktionary, Creative Commons Attribution/Share-Alike License.

- noun
*mathematics*Amathematical problem in which lines drawn from two points in the plane of a circle must meet at a point on the circumference, making equal angles with the normal at that point.

## Etymologies

### from Wiktionary, Creative Commons Attribution/Share-Alike License

Named for a tenth-century Arab mathematician Ibn al-Haytham, whose latinized name, Alhacen, may be rendered as Alhazen.

## Examples

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## Comments

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