A parallel is a quadrilateral in which both bag of the opposite sides are parallel .

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A parallelogram likewise has the following properties:

the opposite angles are congruent; the opposite sides space congruent; nearby angles space supplementary;

A rectangle is a parallel with 4 right angles, so all rectangles are additionally parallelograms and quadrilaterals. ~ above the other hand, no all quadrilaterals and parallelograms space rectangles.

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

The diagonals room 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 actually all the nature of a parallelogram, plus the following:

The diagonals crossing at best angles.

A square deserve to be defined as a rhombus which is likewise a rectangle – in various other words, a parallelogram with four congruent sides and four right angles.

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A trapezoid is a quadrilateral with precisely one pair of parallel sides. (There may be part confusion about this word relying on which country you"re in. In India and also Britain, they say trapezium ; in America, trapezium usually method a quadrilateral v no parallel sides.)

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one isosceles trapezoid is a trapezoid who non-parallel sides space congruent.

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A kite is a quadrilateral with specifically two pairs of nearby congruent sides. (This meaning excludes rhombi. Some textbooks to speak a kite has at least 2 pairs of adjacent congruent sides, therefore a rhombus is a special situation of a kite.)

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


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Venn chart of Quadrilateral category

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