Theory:

A quadrilateral is a plane figure that has four sides or edges, so having four corners or vertices. Quadrilaterals will typically be of standard shapes with four sides like rectangle, square, trapezoid, and kite or irregular and uncharacterized. 
Types of quadrilaterals
There are many types of quadrilaterals. As the word, ‘quad’ means four, all these types of a quadrilateral have four sides and the sum of angles of these shapes is \(360\) degrees.
  • Trapezium
  • Parallelogram
  • Square
  • Rectangle
  • Rhombus
Classification of quadrilaterals
  • Quadrilateral: trapezium
    Properties: two sides are parallel
    Diagram:
trapezoid.png
 
  • Quadrilateral: parallelogram
    Properties: two sides are parallel and opposite angles are equal
    Diagram:
parallel.png
 
  • Quadrilateral: rhombus
    Properties: a parallelogram with four equal sides
    Diagram:
rhombus.png
 
  • Quadrilateral: square
    Properties: four right angles and four equal sides
    Diagram:
square.png
 
  • Quadrilateral: rectangle
    Properties: four right sides and opposite sides are equal
    Diagram:
rectangle.png