| 释义 |
decagon Geom.|ˈdɛkəgən|
[ad. med.L. decagōnum n., -us adj., a. Gr. δεκάγωνον, -ος, f. Gr. δέκα ten, and γωνία corner or angle, -γωνος angled. Used at first in Latin form. Cf. F. décagone, 1652 in Hatzfeld.]
A plane figure having ten sides and ten angles. Also attrib.
[1571Digges Pantom. iv. xxv. H h iij b, The superficies of an equiangle Decagonum.] 1613–39I. Jones in Leoni Palladio's Archit. (1742) II. 46 A Circle without and Decagon within. 1704J. Harris Lex. Techn. s.v., If they are all equal to one another 'tis then called a Regular Decagon, and it may be inscribed in a Circle. 1838Murray's Handbk. N. Germ. 226 The circular portion, or rather the decagon, was not finished till 1227. 1881Trans. Victoria Inst. XIV. 195, I discovered a perfect decagon terra cotta cylinder. |