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Special Quadrilaterals
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Trapezoid (USA) - Trapezium (UK)
Coordinate SystemDefinition of a trapezoid, bases, legs, median and angles of a trapezoid ...
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Parallelogram
ParallelogramA parallelogram is a quadrilateral with opposite sides parallel and congruent. Opposite angles are equal. ...
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Rectangle
RectangleA quadrilateral where all interior angles are 90 degrees and opposite sides are congruent. It is also a special case of a parallelogram...
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Right Trapezoid - Isosceles Trapezoid
TrapezoidA right trapezoid is a trapezoid having two right angles. An isosceles trapezoid is a trapezoid with both legs the same length. ...
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Rhombus
RhombusA quadrilateral with all four sides equal in length is called a rhombus. A rhombus is actually just a special type of parallelogram...
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Square
RectangleA 4-sided regular polygon with all sides equal and all internal angles 90° is called a square....
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