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A four-sided figure.
- ‘When four points are joined, they form a quadrilateral - a four-sided figure.’
- ‘In Treatise on the quadrilateral al-Tusi gave the first extant exposition of the whole system of plane and spherical trigonometry.’
- ‘These are known as the diagonals of the complete quadrilateral.’
- ‘The students were also not aware of relationships among quadrilaterals, such as whether all squares are rectangles or vice versa.’
- ‘It's this quadrilateral KLMN we are going to be interested in.’
- ‘This point is labelled A 3b, to emphasize that it is a degenerate quadrilateral.’
- ‘Consider the first nontrivial instance of the equal-area problem, the quadrilateral shown in Figure 1.’
- ‘Klein had noticed that given five points, four of them always appeared to define a convex quadrilateral.’
- ‘The cross sectional outline is a quadrilateral having a foot surface, a dorsum and two ‘sides.’’
- ‘Cut an 8x8 chessboard into two triangles and two quadrilaterals.’
- ‘The complete quadrilateral is nothing but a 4-line in Morley's terminology.’
- ‘Bennin then showed that the quadrilateral formed by a triangle's equalizer is, indeed, always a Pythagorean quadrilateral.’
- ‘The square, another bench mark, has the smallest contour ratio of all quadrilaterals.’
- ‘In which Barbara gets a little taste of karmic justice, as the eternal triangle becomes a quadrilateral.’
- ‘The scene here has a total of 800701 quadrilaterals, and looks like this.’
- ‘As part of this project the golden quadrilateral was merged with the East-West and North-South corridors.’
- ‘For a quadrilateral ABCD find P minimising AP + BP + CP + DP.’
- ‘The terrain I generated had a total of over 570000 quadrilaterals.’
- ‘In front of the classroom, her teacher babbled on about how to prove a quadrilateral was a square.’
- ‘My guess is that these X's and quadrilateral shapes are caused by windows across the street reflecting the light of the low sun.’
Having four straight sides.
- ‘Techniques were developed that guaranteed all quadrilateral surfaces were planar.’
- ‘The perimeter wall, up to 2.75 m. thick, encloses an irregular quadrilateral area of about 1.59 ha.’
- ‘As in Simone's painting, all the carpets depicted consist of rows of octagonal or quadrilateral compartments.’
- ‘The motifs and figures represented include polychrome images of bison, masks, and quadrilateral signs of unknown meaning.’
- ‘The structure was little more than a hundred story tall segmented cylinder protruding from a quadrilateral base.’
- ‘It is clear from the quadrilateral case that these spaces have several connected components.’
- ‘He said it had been decided to construct service roads for the highways being built under the golden quadrilateral project.’
- ‘It turns out there are many different pairs of quadrilateral shapes that form a nonperiodic tiling pattern.’
- ‘The bilobate living area has quadrilateral contours and is partly flanked by some horizontal logs and a vertical slab.’
- ‘This type of superstructure could be erected on foundations with either round or quadrilateral contours.’
- ‘I am quite aware of the danger in the curved shapes in contrast to the relative safety of quadrilateral shapes.’
- ‘A quadrilateral meeting with Cambodia, Laos and Vietnam is also planned on the sidelines of the series of regular meetings.’
Mid 17th century: from late Latin quadrilaterus (from Latin quadri- four + latus, later- side) + -al.
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