Square, Rectangle, and Rhombus are also Parallelograms. Quadrilaterals can be classified into Parallelograms, Squares, Rectangles, and Rhombuses. Square is the only quadrilateral that satisfies all these conditions. A regular quadrilateral must have 4 equal sides, and 4 equal angles, and its diagonals must bisect each other. A quadrilateral can be regular or irregular.The sum of all interior angles is 360°.Some properties are common to all quadrilaterals. There are many real-life quadrilateral examples: cards, chess boards, traffic signs, etc. The above images are some non-examples of quadrilaterals. Shapes that do not have four sides or four angles or have curved sides or are open shapes are non-examples of quadrilaterals. AC and BD are the two diagonals of the quadrilateral ABCD.A, B, C, and D are the four vertices of the quadrilateral ABCD.AB, BC, CD, and DA are the four sides of the quadrilateral ABCD.∠A, ∠B, ∠C, and ∠D are the four angles of the quadrilateral ABCD.The above image is an example of a quadrilateral. The word ‘quadrilateral’ is derived from the Latin words ‘quadri,’ which means four, and ‘latus’, which means side. A quadrilateral is a polygon having four sides, four angles, and four vertices.
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