The types of quadrilaterals can be classified by relationships of their sides and angles.

Parallelogram: A four-sided 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 Right-angled trapezoid: A right-angled is a trapezoid with two right angles. The following is a right-angle trapezoid. Isosceles trapezoid: In an isosceles trapezoid, non-parallel sides are equal. The following is an isosceles trapezoid. ## Recent Articles 1. ### How to Write an Inequality

Dec 12, 19 07:51 AM

Learn how to write an inequality quickly with this easy to follow math lesson.

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Tough Algebra Word Problems.

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