# Perpendiculars to a Chord

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram CDF Player or other Wolfram Language products.

Requires a Wolfram Notebook System

Edit on desktop, mobile and cloud with any Wolfram Language product.

Let the chord CF intersect the diameter AB of a circle. Let D and E be the feet of the perpendiculars from A and B to CF. Then CD = EF.

[more]
Contributed by: Jay Warendorff (March 2011)

After work by: Antonio Gutierrez

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

The statement of the theorem is in Archimedes' Book of Lemmas: Proposition 13.

## Permanent Citation

"Perpendiculars to a Chord"

http://demonstrations.wolfram.com/PerpendicularsToAChord/

Wolfram Demonstrations Project

Published: March 7 2011