A parallelogram is a square in i m sorry both pairs of the contrary sides room parallel .

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A parallelogram also has the complying with properties:

the contrary angles room congruent; the opposite sides room congruent; adjacent angles are supplementary;

A rectangle is a parallelogram with 4 right angles, so all rectangles are additionally parallelograms and quadrilaterals. Top top the other hand, not all quadrilaterals and parallelograms room rectangles.

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

The diagonals are congruent.

A rhombus is a parallel with four congruent sides. The plural of rhombus is rhombi . (I love that word.)

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

The diagonals crossing at ideal angles.

A square deserve to be identified as a rhombus i m sorry is also a rectangle – in various other words, a parallel with 4 congruent sides and also four appropriate angles.

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A trapezoid is a square with exactly one pair that parallel sides. (There may be part confusion around this word depending on which country you"re in. In India and also Britain, they to speak trapezium ; in America, trapezium usually way a quadrilateral through no parallel sides.)

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

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A kite is a quadrilateral with specifically two pairs of nearby congruent sides. (This definition excludes rhombi. Some textbooks say a kite contends least two pairs of adjacent congruent sides, therefore 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 mirrors the inclusions and intersections the the various types of quadrilaterals.