Quadrilaterals

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 join up), and has straight sides.

A quadrilateral has:

four sides (edges)

four vertices (corners)

interior angles that add to 360 degrees:

Quadrilateral Angles

Try drawing a quadrilateral, and measure the angles. They should add to 360°

Some types are also included in the definition of other types! For example a square, rhombus and rectangle are also parallelograms.