# What is a quadrilaterals

Quadrilateral Definition: A quadrilateral is a closed 2-dimensional shape formed by joining 4 straight sides. A parallelogram is a quadrilateral with opposite sides parallel to each other. A rectangle is a quadrilateral with opposite sides parallel and of equal length. Quadrilateral just means "four sides" (quad means four, lateral means side). A Quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines. In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners. Sometimes, the term quadrangle is used.

The special types of quadrilaterals are listed below: 1. Parallelogram - A two- dimensional flat shaped closed figure made up of four sides where both pairs of. Quadrilaterals are a special type of polygon. As with triangles and other polygons , quadrilaterals have special properties and can be classified by characteristics. This lesson explains the definition and properties of a quadrilateral. We will look at examples of two categories of quadrilaterals. At the end.

A quadrilateral is a four-sided two-dimensional shape. The following 2D shapes are all quadrilaterals: square, rectangle, rhombus, trapezium, parallelogram and .