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Types of quadrilateralsThe 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. 
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|Homepage| Basic geometry |
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|Types of angles|
Complementary and supplementary angles|
Types of polygons|
Convex polygons|
Concave polygons|
Types of triangles|
Types of quadrilaterals|
Solid figures|
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