A ** parallelogram ** is a square in i beg your pardon both bag of opposite sides room parallel .

A parallelogram also has the adhering to properties:

the opposite angles are congruent; opposite sides space congruent; nearby angles room supplementary; A ** rectangle ** is a parallelogram with 4 right angles, so every rectangles are additionally parallelograms and also quadrilaterals. On the various other hand, no all quadrilaterals and also parallelograms space rectangles.

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

The diagonals room congruent.

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

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

The diagonals crossing at appropriate 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 also four ideal angles.

A ** trapezoid ** is a square with specifically 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 to speak ** trapezium ** ; in America, trapezium usually way a quadrilateral with no parallel sides.)

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

A ** kite ** is a quadrilateral with precisely two bag of nearby congruent sides. (This definition excludes rhombi. Part textbooks speak a kite has at least 2 pairs of surrounding congruent sides, for this reason a rhombus is a special situation of a kite.)

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

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## Venn chart of Quadrilateral group

The adhering to Venn Diagram mirrors the inclusions and also intersections the the various species of quadrilaterals.