A polygon that has four sides and four vertices is called a quadrilateral.

The meaning of the word “Quadrilateral” is derived from two Latin words “Quadri” and “Latus”.

- The word “Quadri” means a variant of four.
- The word “Latus” means sides (or edges).

The quadrilaterals are another famous geometrical shapes in geometry and it is essential to learn for studying the geometric shapes in mathematical approach.

A quadrilateral can be constructed geometrically in three simple steps.

- Identify four points on a plane.
- Give a name to each point. In this example, $P, Q, R$ and $S$.
- Join all of them as a closed geometric shape by connecting every two points by a straight line.

Thus, a quadraliteral is constructed geometrically. It is written written as $□ PQRS$ symbolically and read as the $Quadrilateral \, PQRS$.

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