◀ ▲ ▶Branches / Geometry / Elements-euclid / Book-11-elementary-stereometry / Proposition: Prop. 11.12: Construction of Straight Line Perpendicular to Plane from point on Plane

Proposition: Prop. 11.12: Construction of Straight Line Perpendicular to Plane from point on Plane

Euclid's Formulation

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

• Let the given plane be the reference (plane), and $A$ a point in it.
• So, it is required to set up a straight line at right angles to the reference plane at point $A$.

Modern Formulation

(not yet contributed)

Table of Contents

Proofs: 1

Mentioned in:

Proofs: 1 2 3 4

Thank you to the contributors under CC BY-SA 4.0!

Github:

non-Github:

@Fitzpatrick

References

Adapted from (subject to copyright, with kind permission)

1. Fitzpatrick, Richard: Euclid's "Elements of Geometry"

Adapted from CC BY-SA 3.0 Sources:

1. Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016