| 单词 | right corner |
| 释义 | > as lemmasright corner right corner n. Mathematics †(a) = right angle n. 1 (obsolete); (b) a corner formed by the meeting of two or more planes which are perpendicular to each other (now rare). ΘΚΠ the world > space > shape > angularity > [noun] > angle or corner > right angle right anglec1400 right corner1548 rectangle1560 quadrate1568 straight angle1601 1548 T. Cooper Bibliotheca Eliotæ (rev. ed.) Orthogonius, that hath ryght corners. 1656 T. Blount Glossographia Rectanguled, that hath right Corners or Angles. 1830 D. Brewster tr. A. M. Legendre Elements Geom. & Trigonom. 241 A right corner would be the angle formed by two planes perpendicular to each other. 1992 P. Janich in R. E. Butts Euclid's Heritage viii. 155 (caption) Three plane surfaces of a right corner. < as lemmas |
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