

QuadrilateralAlso tetragon, quadrangle
From Latin: quadri "four" + latus "side"
Four coplanar line segments linked end to end to create a closed figure.
A 4sided polygon.
Try this Drag the orange dots on each vertex
to reshape the quadrilateral.
The quadrilateral is any 4sided polygon.
But it is the parent of a whole family of figures, each with their own distinct names and characteristics.
See also Tetragon.
Quadrangle
Quadrangle ("four angles") is another name for a quadrilateral.
However, it is a word often used for an open space where people gather, say on a school or university campus.
In this case the quadrangle (or "quad") is usually a rectangle or square.
Types of quadrilateral
Other polygon topics
General
Types of polygon
Area of various polygon types
Perimeter of various polygon types
Angles associated with polygons
Named polygons
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