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complete quadrilateral

American  

noun

Geometry.
  1. a plane figure composed of four straight lines and their points of intersection.


Example Sentences

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A figure formed by four lines in a plane is called a complete quadrilateral, or, shorter, a four-side.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" by Various

Thus, The three pairs of rays which may be drawn from a point through the three pairs of opposite vertices of a complete quadrilateral are said to be in involution.

From An Elementary Course in Synthetic Projective Geometry by Lehmer, Derrick Norman

The whole theory thus far developed may be dualized, and a theory of lines in involution may be built up, starting with the complete quadrilateral.

From An Elementary Course in Synthetic Projective Geometry by Lehmer, Derrick Norman

The method which has been used in Chapter II to develop the notion of four harmonic points by means of the complete quadrilateral is due to Von Staudt.

From An Elementary Course in Synthetic Projective Geometry by Lehmer, Derrick Norman

A four-side is usually called a complete quadrilateral, and a four-point a complete quadrangle.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" by Various