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

## Introduction

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

1. The word “Quadri” means a variant of four.
2. 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. ### Construction

A quadrilateral can be constructed geometrically in three simple steps.

1. Identify four points on a plane.
2. Give a name to each point. In this example, $P, Q, R$ and $S$.
3. 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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