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 Βιβλία Βιβλία
A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
First principles of Euclid: an introduction to the study of the first book ... - Σελίδα 18
των T S. Taylor - 1880
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