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quadrilaterals <a quadrilateral; quadrilaterals> N

quadrilateral

quadrilateral ADJ

quadrilateral N (shapes)

complete quadrilateral MATH

concave quadrilateral MATH

convex quadrilateral MATH

cyclic quadrilateral MATH

regular quadrilateral

Monolingual examples (not verified by PONS Editors)

English
This configuration describes two quadrilaterals that are simultaneously inscribed and circumscribed in each other.
en.wikipedia.org
Each of these is divided into smaller categories; triangles can be equilateral, isosceles, obtuse, acute, scalene, etc. while quadrilaterals can be rectangles, rhombi, trapezoids, squares, etc.
en.wikipedia.org
For instance, polygons are classified according to their number of edges as triangles, quadrilaterals, pentagons, etc.
en.wikipedia.org
Other names for these quadrilaterals are concyclic quadrilateral and chordal quadrilateral, the latter since the sides of the quadrilateral are chords of the circumcircle.
en.wikipedia.org

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