Category:Semicircles

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

In the words of Euclid:

A semicircle is the figure contained by the diameter and the circumference cut off by it. And the center of the semicircle is the same as that of the circle.

(The Elements: Book $\text{I}$: Definition $18$)