Types of Quadrilateral

(i) Parallelogram: A quadrilateral in which opposite sides are parallel is called parallelogram and it is written as Parallelogram.

(ii) Rectangle: A parallelogram each of whose angle is 90°, is called a rectangle.

(iii) Square: A rectangle having all sides equal, is called a square.

(iv) Rhombus: A parallelogram having all sides equal is called a rhombus.

(v) Trapezium: A quadrilateral in which two opposite sides are parallel and two opposite sides are non-parallel is called a trapezium.
If two non-parallel sides of a trapezium are equal, then it is called an isosceles trapezium.

(vi) Kite: A quadrilateral in which two pairs of adjacent are equal is known as the kite.

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