Definition:Orthic Triangle/Also known as

Orthic Triangle: Also known as

The orthic triangle of a given triangle $\triangle ABC$ is also known as the pedal triangle of $\triangle ABC$.

However, as this term is also used for the pedal triangle of any arbitrary point with respect to $\triangle ABC$, it is the policy of $\mathsf{Pr} \infty \mathsf{fWiki}$ to use the term orthic triangle consistently.

Sources

• 1953: L. Harwood Clarke: A Note Book in Pure Mathematics ... (previous) ... (next): $\text V$. Trigonometry: The pedal triangle
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): pedal triangle
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): pedal triangle: 1.
• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): pedal triangle
• 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): pedal triangle