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

A parallelogram likewise has the adhering to properties:

the contrary angles space congruent; opposite sides space congruent; surrounding angles are supplementary; A ** rectangle ** is a parallel with four right angles, so all rectangles are likewise parallelograms and also quadrilaterals. On the other hand, no all quadrilaterals and parallelograms space rectangles.

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

The diagonals are congruent.

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

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

The diagonals intersect at ideal angles. A ** square ** have the right 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.

A ** trapezoid ** is a quadrilateral with specifically one pair that parallel sides. (There might be some confusion about this word relying on which nation you"re in. In India and Britain, they to speak ** trapezium ** ; in America, trapezium usually method a quadrilateral with no parallel sides.)

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

A ** kite ** is a quadrilateral with specifically two pairs of surrounding congruent sides. (This an interpretation excludes rhombi. Part textbooks speak a kite contends least 2 pairs of nearby congruent sides, therefore a rhombus is a special instance of a kite.)

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

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## Venn diagram of Quadrilateral classification

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