| 释义 |
hypotenuse|hɪp-, haɪˈpɒtənjuːs|
Forms: (6–7 hypothenusa, 7 -tenusa, -tinusa), 6 hipothenuse, 7– hypotenuse, hypothenuse.
[ad. late L. hypotēnūsa, a. Gr. ὑποτείνουσα pr. pple. (fem.), ‘stretching under, subtending’ (the full expression being ἡ τὴν ὀρθὴν γωνίαν ὑποτείνουσα (sc. γραµµή or πλευρά), the line or side subtending the right angle), f. ὑπό under + τείνειν to stretch. In F. hypoténuse.
In the 16–17th c. the Latin form hypotenusa was commonly used. The erroneous spelling with th (cf. F. ypothenuse, 1520) was app. the more frequent in 19th–c. use.]
The side of a right-angled triangle which subtends, or is opposite to, the right angle.
1571Digges Pantom. ii. ii. L iv a, Y⊇ squares of the two contayning sides ioyned togither, are equall to the square of y⊇ Hypothenusa. 1594Blundevil Exerc. ii. (1636) 119 They cal the line Secant the Hipothenuse, because it subtendeth the right angle A. 1674S. Jeake Arith. (1696) 174 The Perpendicular, the Base, and the Hypotenusa. 1678Cudworth Intell. Syst. i. v. 734 The Power of the Hypotenuse in a Rectangular Triangle is Equal to the Powers of both the Sides. 1704J. Harris Lex. Techn. s.v. Plain Sailing, The Base of the Triangle represents the Departure; and the Hypothenuse the Distance Sailed. 1834Nat. Philos. III. Navigation i. i. 2 (U.K.S.) The side AB, opposite to the right angle, is called the hypotenuse. 1878H. S. Wilson Alp. Ascents iv. 117 The hypothenuse of the angles. |