# Meaning of quadrilateral in English:

### noun

• A four-sided figure.

‘Cut an 8x8 chessboard into two triangles and two quadrilaterals.’
• ‘The students were also not aware of relationships among quadrilaterals, such as whether all squares are rectangles or vice versa.’
• ‘The terrain I generated had a total of over 570000 quadrilaterals.’
• ‘The scene here has a total of 800701 quadrilaterals, and looks like this.’
• ‘The square, another bench mark, has the smallest contour ratio of all quadrilaterals.’
• ‘When four points are joined, they form a quadrilateral - a four-sided figure.’
• ‘Consider the first nontrivial instance of the equal-area problem, the quadrilateral shown in Figure 1.’
• ‘In which Barbara gets a little taste of karmic justice, as the eternal triangle becomes a quadrilateral.’
• ‘In front of the classroom, her teacher babbled on about how to prove a quadrilateral was a square.’
• ‘Bennin then showed that the quadrilateral formed by a triangle's equalizer is, indeed, always a Pythagorean quadrilateral.’
• ‘The cross sectional outline is a quadrilateral having a foot surface, a dorsum and two ‘sides.’’
• ‘These are known as the diagonals of the complete quadrilateral.’
• ‘This point is labelled A 3b, to emphasize that it is a degenerate quadrilateral.’
• ‘As part of this project the golden quadrilateral was merged with the East-West and North-South corridors.’
• ‘Klein had noticed that given five points, four of them always appeared to define a convex quadrilateral.’
• ‘The complete quadrilateral is nothing but a 4-line in Morley's terminology.’
• ‘It's this quadrilateral KLMN we are going to be interested in.’
• ‘My guess is that these X's and quadrilateral shapes are caused by windows across the street reflecting the light of the low sun.’
• ‘For a quadrilateral ABCD find P minimising AP + BP + CP + DP.’
• ‘In Treatise on the quadrilateral al-Tusi gave the first extant exposition of the whole system of plane and spherical trigonometry.’

• Having four straight sides.

‘The bilobate living area has quadrilateral contours and is partly flanked by some horizontal logs and a vertical slab.’
• ‘Techniques were developed that guaranteed all quadrilateral surfaces were planar.’
• ‘It turns out there are many different pairs of quadrilateral shapes that form a nonperiodic tiling pattern.’
• ‘This type of superstructure could be erected on foundations with either round or quadrilateral contours.’
• ‘The motifs and figures represented include polychrome images of bison, masks, and quadrilateral signs of unknown meaning.’
• ‘I am quite aware of the danger in the curved shapes in contrast to the relative safety of quadrilateral shapes.’
• ‘As in Simone's painting, all the carpets depicted consist of rows of octagonal or quadrilateral compartments.’
• ‘The structure was little more than a hundred story tall segmented cylinder protruding from a quadrilateral base.’
• ‘A quadrilateral meeting with Cambodia, Laos and Vietnam is also planned on the sidelines of the series of regular meetings.’
• ‘The perimeter wall, up to 2.75 m. thick, encloses an irregular quadrilateral area of about 1.59 ha.’
• ‘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.’
quadrilateral, rectangular, oblong, right-angled, at right angles, perpendicular

### Origin

Mid 17th century from late Latin quadrilaterus (from Latin quadri- ‘four’ + latus, later- ‘side’) + -al.