A ** parallel ** is a square in which both bag of opposite sides space parallel .

A parallelogram also has the adhering to properties:

opposite angles space congruent; the contrary sides are congruent; nearby angles room supplementary; A ** rectangle ** is a parallelogram with four right angles, so all rectangles are likewise parallelograms and quadrilaterals. ~ above the other hand, no all quadrilaterals and also parallelograms space rectangles.

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

The diagonals are congruent.

A ** rhombus ** is a parallelogram with 4 congruent sides. The many of rhombus is ** rhombi ** . (I love the word.)

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

The diagonals crossing at right angles. A ** square ** can be defined as a rhombus i beg your pardon is additionally a rectangle – in other words, a parallel with four congruent sides and also four best angles.

A ** trapezoid ** is a square with specifically one pair that parallel sides. (There may be part confusion about this word depending upon which nation you"re in. In India and also Britain, they speak ** trapezium ** ; in America, trapezium usually method a quadrilateral with no parallel sides.)

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

A ** dragon ** is a quadrilateral with precisely two pairs of surrounding congruent sides. (This meaning excludes rhombi. Some textbooks say a kite contends least two pairs of nearby congruent sides, for this reason a rhombus is a special situation of a kite.)

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

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## Venn diagram of Quadrilateral group

The following Venn Diagram mirrors the inclusions and intersections that the various types of quadrilaterals.