Areteem: What is Kurrah's Theorem?

Online Course Discussion Forum

Title is self explanatory; I can't seem to find much about it on Google.

I'd assume this:

https://pdfs.semanticscholar.org/d75f/b99ea6b086028313685450235c7774b0b092.pdf

Ignore the abstract, and read the last, italicized sentence of the first paragraph.

Thank you!

It's a theorem in geometry.

Draw triangle ABC. Construct D, E on AC with <ABC = <ADB = <BEC. Kurrah's Theorem states that

AB^2 + BC^2 = AC(AD+CE).