QUADRILATERAL

 A quadrilateral is a closed shape and a type of polygon that has four sides, four vertices and four angles. It is formed by joining four non-collinear points. The sum of interior angles of quadrilaterals is always equal to 360 degrees.

The word quadrilateral is derived from the Latin words ‘Quadra’ which means four and ‘Latus’ means ‘sides’. It is not necessary that all the four sides of a quadrilateral are equal in length. Hence, we can have different types of quadrilaterals based on sides and angles. Let us more interesting facts about quadrilaterals in this article. 

A quadrilateral is a plane figure that has four sides or edges, and also has four corners or vertices. The angles are present at the four vertices or corners of the quadrilateral. If ABCD is a quadrilateral then angles at the vertices are ∠A, ∠B, ∠C and ∠D. The sides of a quadrilateral are AB, BC, CD and DA. 

If we join the opposite vertices of the quadrilateral, we get the diagonals. In the below figure AC and BD are the diagonals of quadrilateral ABCD. 





Let’s have a look at the table below to understand what quadrilateral is.

QuadrilateralTwo-dimensional plane figure enclosed by 4 line segments

Or

A polygon with 4 edges and 4 vertices

Number of sides4
Number of vertices4
Number of diagonals2
Sum of all interior angles360 degrees
Sum of all exterior angles360 degrees

Types of Quadrilaterals

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