Quadrilateral: Difference between revisions

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A quadrilateral is a four-sided geometric figure. Some common quadrilaterals are squares, rectangles, rombuses, parrallelograms, and trapezoids.

Challenging Problems in Geometry -- A good book for students who already have a solid handle on elementary geometry.
Geometry Revisited -- A classic.

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	A '''quadrilateral''' is a four-sided geometric figure.		A '''quadrilateral''' is a four-sided geometric figure. Some common quadrilaterals are squares, rectangles, rombuses, parrallelograms, and trapezoids.