Definition:Euclid's Definitions - Book IV/5 - Circle Inscribed

Definition

In the words of Euclid:

Similarly a circle is said to be inscribed in a figure when the circumference of the circle touches each side of the figure in which it is inscribed.

(The Elements: Book $\text{IV}$: Definition $5$)

Sources

• 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 2 (2nd ed.) ... (previous) ... (next): Book $\text{IV}$. Definitions