Euclid:Proposition/XI/12

Proposition

In the words of Euclid:

To set up a straight line at right angles to a given plane from a given point on it.

(The Elements: Book $\text{XI}$: Proposition $12$)

Sources

• 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): Book $\text{XI}$. Propositions