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A trapezoid (or trapezium, outside of North America) has two parallel sides.

The more common definition is a four-sided figure with exactly one pair of parallel sides. By this definition, figures with two sets of parallel sides such as a rectangle are nottrapezoids.

Some mathematicians use a more general definition that allows for one or more pair of parallel sides. By this definition, a rectangle, square, or rhombus would be considered as special cases of a trapezoid.

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Dock Spencer

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Q: How many parallel line a trapezoid have?
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