| 单词 | central angle |
| 释义 | > as lemmascentral angle central angle n. an angle formed at the centre of something; esp. any angle at the centre of a circle which is subtended by an arc of its circumference. ΚΠ 1705 Acct. Origin & Formation Fossil-shells 48 Those triangular Dilatations being not join'd together as Valves of one Shell, must..fold in their Central Angle. 1766 A. Cumming Elements Clock & Watch-work 185 The same central angle ACB, subtends both the curves on the edges of the cylinder. 1854 Boston Daily Atlas 8 Dec. 2/2 The southern limb of the central angle..is two German miles in length, and presents a steep, shelving coast. 2006 J. Stewart et al. Precalculus (ed. 5) vi. 473 Angular speed is the rate at which the central angle..is changing. < as lemmas |
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