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There's more than four.

Parallelogram: A four-sided polygon with two pairs of parallel and equal sides. The following is a parallelogram.

Rectangle: A rectangle is a parallelogram with 4 right angles. The following is a rectangle.

Square:A square is a rectangle with 4 equal sides.The following is square

Rhombus: A rhombus is a parallelogram with 4 equal sides. The following is a rhombus.

Trapezoid: A trapezoid is a quadrilateral with only one pair of parallel sides. The following are trapezoids.

Trapezium: A trapezium is a trapezoid with no equal sides.The following is a scalene trapezoid.

The major three ones are parallelograms, trapezoids, and trapeziums.

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Wiki User

13y ago

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