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PD12M

Open book with a drawing of a circle on it

The image shows an open book with a drawing of a circle on it.

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The image shows an open book with a drawing of a circle on it. The book is filled with text and diagrams, providing detailed information about the geometry of the circle.

Credit: Wikimedia Commons
License: https://creativecommons.org/publicdomain/mark/1.0/

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