出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/08/02 18:26 UTC 版)
In technical drawing, an oval (from Latin ovum, 'egg') is a figure constructed from two pairs of arcs, with two different radii (see image on the right). The arcs are joined at a point, in which lines tangential to both joining arcs lie on the same line, thus making the joint smooth. Any point of an oval belongs to an arc with a constant radius (shorter or longer), whereas in an ellipse the radius is continuously changing.
![]()
名詞の変化形:
|