A parallel is a quadrilateral in i beg your pardon both bag of the contrary sides are parallel .

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A parallelogram also has the adhering to properties:

the contrary angles room congruent; opposite sides room congruent; surrounding angles space supplementary;

A rectangle is a parallel with four right angles, so every rectangles are additionally parallelograms and quadrilaterals. ~ above the other hand, no all quadrilaterals and also parallelograms room rectangles.

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A rectangle has actually all the nature of a parallelogram, to add the following:

The diagonals space congruent.

A rhombus is a parallelogram with four congruent sides. The many of rhombus is rhombi . (I love the word.)

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A rhombus has all the nature of a parallelogram, plus the following:

The diagonals intersect at right angles.

A square have the right to be defined as a rhombus i m sorry is also a rectangle – in other words, a parallel with 4 congruent sides and four best angles.

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A trapezoid is a quadrilateral with specifically one pair of parallel sides. (There might be some confusion about this word depending on which country you"re in. In India and also Britain, they to speak trapezium ; in America, trapezium usually method a quadrilateral v no parallel sides.)

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an isosceles trapezoid is a trapezoid whose non-parallel sides space congruent.

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A dragon is a quadrilateral with precisely two bag of adjacent congruent sides. (This meaning excludes rhombi. Part textbooks say a kite contends least 2 pairs of nearby congruent sides, so a rhombus is a special instance of a kite.)

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A scalene quadrilateral is a four-sided polygon that has no congruent sides. Three instances are presented below.


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Venn diagram of Quadrilateral group

The adhering to Venn Diagram reflects the inclusions and intersections of the various types of quadrilaterals.