Euclid:Proposition/X/17/Lemma

From ProofWiki
Jump to navigation Jump to search

Proposition

In the words of Euclid:

If to any straight line there be applied a parallelogram deficient by a square figure, the applied parallelogram is equal to the rectangle contained by the segments of the straight line resulting from the application.

(The Elements: Book $\text{X}$: Proposition $17$ : Lemma)


Sources