Pythagorasn.

Brit.

/pʌɪˈθaɡ(ə)rəs/, U.S.

/paɪˈθæɡərəs/,

/pəˈθæɡərəs/

Origin: From a proper name. Etymon: proper name Pythagoras.

Etymology: < the name of Pythagoras (classical Latin Pȳthagorās , ancient Greek Πυθαγόρας ), ancient Greek philosopher and mathematician (6th. cent b.c.). Compare Pythagorean adj.In Pythagoras' theorem n. after post-classical Latin theorema Pythagoricum (1655 in the passage translated in quot. 1660 for Pythagoras' theorem n.). This is based on medieval Greek or earlier scholia on Euclid, discussing the invention of this theorem by Pythagoras, which in turn go back to the Byzantine Greek commentator Proclus: καὶ ἐστι τὸ θεώρημα τοῦτο Πυθαγόρειον ‘and this theorem is [called] Pythagorean’ ( Comm. Euclid's Elem. §305). Euclid himself does not mention Pythagoras.

Mathematics.

Pythagoras' theorem n. a theorem in Euclidean geometry stating that, for any right-angled triangle, the area of a square whose side is the longest side of the triangle is equal to the sum of the areas of the squares whose sides are the other two sides of the triangle. Also Pythagoras's theorem, theorem of Pythagoras.The theorem, which appears as the 47th proposition of the first book of Euclid's Elements, is commonly cited as: ‘the square on the hypotenuse is equal to the sum of the squares on the other two sides’. The classical right-angled triangle is one with sides in the ratio 3:4:5: 3² + 4² = 5².In the United States the theorem is usually known as the Pythagorean theorem (see Pythagorean theorem n. at Pythagorean n. and adj. Compounds).

ΚΠ

1570 H. Billingsley in tr. Euclid Elements Geom. i. xlxii. f. 58 This most excellent and notable Theoreme was first inuented of the great philosopher Pithagoras.]

1660 tr. I. Barrow Euclide's Elements i. xlvii. 35 This most excellent and usefull theoreme hath deserved the title of Pythagoras his theoreme, because he was the inventer of it [L. theorema ab inventore Pythagora, Pythagoricum dici meruit].

1694 W. Wotton Refl. Anc. & Mod. Learning viii. 100 Nice we are sure they were not, because the Theorem of Pythagoras was not then found out.

1705 J. Harris tr. I. G. Pardies Short Plain Elements Geom. (ed. 3) iv. 53 Before we go to Solids, I thought it proper to give the Learner here, this most noble Theorem of Pythagoras.

1739 J. Hanna tr. C. Wolfius Treat. Algebra 58 This is called the Theorem of Pythagoras, because he first found it, for which his Auditors sacrificed 100 oxen to the Gods.

1899 Amer. Math. Monthly 6 73 The theorem of Pythagoras has received several nicknames.

1913 W. J. Dobbs School Course in Geom. v. 113 This proof of Pythagoras' Theorem is due to Mr. C. S. Jackson.

1981 J. Monaco How to read Film (rev. ed.) ii. 86 Cynics will note that the Academy aperture is an expression of Pythagoras's theorem.

2003 Bull. Symbolic Logic 9 500 Faced with two concrete proofs in mathematics—for example, two proofs of the Theorem of Pythagoras, [etc.].

This is a new entry (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	pythagoras
释义	Pythagorasn. Brit. /pʌɪˈθaɡ(ə)rəs/, U.S. /paɪˈθæɡərəs/, /pəˈθæɡərəs/ Origin: From a proper name. Etymon: proper name Pythagoras. Etymology: < the name of Pythagoras (classical Latin Pȳthagorās , ancient Greek Πυθαγόρας ), ancient Greek philosopher and mathematician (6th. cent b.c.). Compare Pythagorean adj.In Pythagoras' theorem n. after post-classical Latin theorema Pythagoricum (1655 in the passage translated in quot. 1660 for Pythagoras' theorem n.). This is based on medieval Greek or earlier scholia on Euclid, discussing the invention of this theorem by Pythagoras, which in turn go back to the Byzantine Greek commentator Proclus: καὶ ἐστι τὸ θεώρημα τοῦτο Πυθαγόρειον ‘and this theorem is [called] Pythagorean’ ( Comm. Euclid's Elem. §305). Euclid himself does not mention Pythagoras. Mathematics. Pythagoras' theorem n. a theorem in Euclidean geometry stating that, for any right-angled triangle, the area of a square whose side is the longest side of the triangle is equal to the sum of the areas of the squares whose sides are the other two sides of the triangle. Also Pythagoras's theorem, theorem of Pythagoras.The theorem, which appears as the 47th proposition of the first book of Euclid's Elements, is commonly cited as: ‘the square on the hypotenuse is equal to the sum of the squares on the other two sides’. The classical right-angled triangle is one with sides in the ratio 3:4:5: 3² + 4² = 5².In the United States the theorem is usually known as the Pythagorean theorem (see Pythagorean theorem n. at Pythagorean n. and adj. Compounds). ΚΠ 1570 H. Billingsley in tr. Euclid Elements Geom. i. xlxii. f. 58 This most excellent and notable Theoreme was first inuented of the great philosopher Pithagoras.] 1660 tr. I. Barrow Euclide's Elements i. xlvii. 35 This most excellent and usefull theoreme hath deserved the title of Pythagoras his theoreme, because he was the inventer of it [L. theorema ab inventore Pythagora, Pythagoricum dici meruit]. 1694 W. Wotton Refl. Anc. & Mod. Learning viii. 100 Nice we are sure they were not, because the Theorem of Pythagoras was not then found out. 1705 J. Harris tr. I. G. Pardies Short Plain Elements Geom. (ed. 3) iv. 53 Before we go to Solids, I thought it proper to give the Learner here, this most noble Theorem of Pythagoras. 1739 J. Hanna tr. C. Wolfius Treat. Algebra 58 This is called the Theorem of Pythagoras, because he first found it, for which his Auditors sacrificed 100 oxen to the Gods. 1899 Amer. Math. Monthly 6 73 The theorem of Pythagoras has received several nicknames. 1913 W. J. Dobbs School Course in Geom. v. 113 This proof of Pythagoras' Theorem is due to Mr. C. S. Jackson. 1981 J. Monaco How to read Film (rev. ed.) ii. 86 Cynics will note that the Academy aperture is an expression of Pythagoras's theorem. 2003 Bull. Symbolic Logic 9 500 Faced with two concrete proofs in mathematics—for example, two proofs of the Theorem of Pythagoras, [etc.]. This is a new entry (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1660
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