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Types of Quadrilaterals
1. Parallelogram:A quadrilateral whose opposite sides are parallel and equal is called a parallelogram. Its opposite angles are equal.Here LMNO is a parallelogram. (i) LM is parallel to ON. 2. Rectangle:A rectangle is a parallelogram in which all the angles are right angles.Here ABCD is a rectangle. (i) So, AB is parallel to DC. 3. Square:A square is a rectangle in which all sides are equal.Here ABCD is a square. (i) AB is parallel to DC. 4. Rhombus:A rhombus is a parallelogram whose all sides are equal, opposite sides are parallel and opposite angles are equal.Here LMNO is a rhombus. (i) LM = MN = NO = OL 5. Trapezium:A quadrilateral is called trapezium if a pair of its opposite sides are parallel.Here ABCD is a trapezium. AB is parallel to DC If a trapezium has non parallel sides equal, it is called isosceles trapezium. Let’s discuss about the properties of types of quadrilateral in the table below;
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