A ** parallel ** is a quadrilateral in i beg your pardon both bag of the opposite sides space parallel .

A parallelogram also has the complying with properties:

opposite angles room congruent; opposite sides space congruent; surrounding angles space supplementary; A ** rectangle ** is a parallelogram with 4 right angles, so all rectangles are additionally parallelograms and quadrilaterals. ~ above the other hand, no all quadrilaterals and parallelograms are rectangles.

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

The diagonals room congruent.

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

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

The diagonals intersect at right angles. A ** square ** deserve to be identified as a rhombus i m sorry is also a rectangle – in various other words, a parallelogram with four congruent sides and also four right angles.

A ** trapezoid ** is a square with precisely one pair of parallel sides. (There might be part confusion about this word depending upon which nation you"re in. In India and Britain, they say ** trapezium ** ; in America, trapezium usually way a quadrilateral with no parallel sides.)

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

A ** kite ** is a square with specifically two bag of nearby congruent sides. (This meaning excludes rhombi. Part textbooks say a kite has at least 2 pairs of surrounding congruent sides, so a rhombus is a special instance of a kite.)

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

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## Venn diagram of Quadrilateral category

The complying with Venn Diagram shows the inclusions and intersections the the various varieties of quadrilaterals.