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Parallelogram | |
---|---|
Type | quadrilateral, trapezium |
Edges and vertices | 4 |
Symmetry group | C2, +, |
Area | b × h (base × height); ab sin θ (product of adjacent sides and sine of the vertex angle determined by them) |
Properties | convex |
A parallelogram is a polygon with four sides (a quadrilateral). It has two pairs of parallel sides (line segments which never meet if the lines were allowed to extend beyond their end points). The opposite sides of a parallelogram have the same length (they are equally long). The word "parallelogram" comes from the Greek word "parallelogrammon" (bounded by parallel lines).Rectangles, rhombuses, and squares are all parallelograms.