# A Concurrency from Six Pedal Points

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 ABC be a triangle and P and Q be two other points. Drop perpendiculars from P to the three sides of ABC. Let X, Y, and Z be the feet of the perpendiculars (pedals) of Q on the three perpendiculars. Let X', Y', and Z' be the pedals of P on AQ, BQ, and CQ. Then XX', YY", and ZZ' are concurrent.

Contributed by: Jay Warendorff (September 2008)

After work by: Darij Grinberg

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

The theorem is contained in "The Theorem on the Six Pedals", available on Darij Grinberg's home page.

## Permanent Citation

"A Concurrency from Six Pedal Points"

http://demonstrations.wolfram.com/AConcurrencyFromSixPedalPoints/

Wolfram Demonstrations Project

Published: September 10 2008