| 单词 | obtuse angle |
| 释义 | > as lemmasobtuse angle b. Geometry. Of a plane angle: greater than 90 degrees and less than 180 degrees. Frequently in obtuse angle. ΘΚΠ the world > space > shape > angularity > [noun] > angle or corner > obtuse angle obtuse angle1570 bull's-nose1842 the world > space > shape > angularity > [adjective] > constituting an angle > obtuse obtuse1570 the world > relative properties > number > geometry > angle > [adjective] > obtuse angled blunt-angled1551 obtusiangle?a1560 obtuse1570 obtuse-angled1570 amblygon1605 amblygonal1618 obtusangulous1680 amblygonial1704 obtusangular1706 amblygonous1728 obtuse angular1782 1570 H. Billingsley tr. Euclid Elements Geom. i. f. 2v An obtuse angle is that which is greater then a right angle. 1633 P. Fletcher Purple Island iii. xxi. 34 Into two obtuser angles bended. 1701 N. Grew Cosmol. Sacra ii. v. §18 All Salts are Angular; with Obtuse, Right, or Acute Angles. 1790 Nat. Hist. in J. White Jrnl. Voy. New S. Wales App. 283 Their base is a triangle of the scalenus kind, or having one angle obtuse and two acute. 1879 E. P. Wright Animal Life 6 This bone forms an obtuse angle with the pelvis. 1972 M. Kline Math. Thought xii. 239 The negative values of the cosine and tangent functions for obtuse angles. 1991 Choice Mar. 77/3 Most restaurants now have low chairs..with the backs at an acute angle, compressing the stomach, whereas they should be at right angles and preferably an obtuse angle. < as lemmas |
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