Types of quadrilateralsThe types of quadrilaterals can be classified by relationships of their sides and angles. Parallelogram: A foursided polygon with two pairs of parallel and equal sides. The following is a parallelogram. Rectangle: A rectangle is a parallelogram with 4 right angles. The following is a rectangle. Square:A square is a rectangle with 4 equal sides.The following is square Rhombus: A rhombus is a parallelogram with 4 equal sides. The following is a rhombus. Trapezoid: A trapezoid is a quadrilateral with only one pair of parallel sides. The following are trapezoids. Scalene trapezoid: A scalene trapezoid is a trapezoid with no equal sides.The following is a scalene trapezoid Rightangled trapezoid: A rightangled is a trapezoid with two right angles. The following is a rightangle trapezoid. Isosceles trapezoid: In an isosceles trapezoid, nonparallel sides are equal. The following is an isosceles trapezoid. 




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