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This category contains results about Circles.
Definitions specific to this category can be found in Definitions/Circles.

In the words of Euclid:

A circle is a plane figure contained by one line such that all the straight lines falling upon it from one point among those lying within the figure are equal to one another;

(The Elements: Book $\text{I}$: Definition $15$)



This category has the following 18 subcategories, out of 18 total.

Pages in category "Circles"

The following 97 pages are in this category, out of 97 total.