Definition:Quadrangle
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Definition
A quadrangle is a plane figure consisting of $4$ points joined by straight lines.
No $3$ points of a quadrangle are collinear.
Also see
- Results about quadrangles can be found here.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): quadrangle
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): quadrangle