a sector of a circle.
| 单词 | θ115926 |
| 释义 | the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > figure forming part of circle (9) nook cantle1551 a sector of a circle. quadrate1551 A quarter; spec. a quarter of a circle. Cf. quadrant, n.1 3. Obsolete. quadrant1559 A quarter of a circle or circular body; (Geometry) (a) a plane figure bounded by two radii of a circle at right angles and the arc cut off by them… section1570 Mathematics. A segment of a circle. Obsolete. sector1570 Geometry. A plane figure contained by two radii and the arc of a circle, ellipse, or other central curve intercepted by them. segment1570 Geometry. A plane figure contained by a right line and a portion of the circumference of a circle. In full segment of a circle. Also, see quot. 1728. sextant1628 An instrument for making angular measurements, esp. of the altitude of celestial or distant terrestrial objects, consisting of a graduated arc… half-round1718 A semicircle; a hemispherical figure. octant1753 An arc of a circle or of the horizon forming one-eighth of the whole; one-eighth of the area of a circle, contained within two radii at an angle… |
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