Euclid:Proposition/XII/3

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Proposition

In the words of Euclid:

Any pyramid which has a triangular base is divided into two pyramids equal and similar to one another, similar to the whole and having triangular bases, and into two equal prisms; and the two prisms are greater than the half of the whole pyramid.

(The Elements: Book $\text{XII}$: Proposition $3$)


Sources