Quotes · Quote card
Quotation from Elements, Book I by Euclid
“In a right-angled triangle (ABC) the square on the hypotenuse (AB) is equal to the sum of the squares on the other two sides (AC, BC).”
Elements, Book I, Book I, Prop. XLVII, trans. John Casey
The enunciation of the theorem traditionally credited to Pythagoras, the summit of Book I.
Citation: "In a right-angled triangle (ABC) the square on the hypotenuse (AB) is equal to the sum of the squares on the other two sides (AC, BC)." — Euclid, Elements, Book I, Book I, Prop. XLVII, trans. John Casey. (id euclid-elements-book-i-q7)
Portrait: Euclidi Megaren (Euclide) - Studiolo di Federico da Montefeltro, Justus van Gent / Pedro Berruguete, Public domain.
