Proposition: Prop. 11.12: Construction of Straight Line Perpendicular to Plane from point on Plane
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 $A$.
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Table of Contents
Proofs: 1 2 3 4
Thank you to the contributors under CC BY-SA 4.0!
Adapted from (subject to copyright, with kind permission)
- Fitzpatrick, Richard: Euclid's "Elements of Geometry"
Adapted from CC BY-SA 3.0 Sources:
- Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016