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

A parallelogram likewise has the adhering to properties:

the opposite angles space congruent; the contrary sides are congruent; surrounding angles are supplementary; A ** rectangle ** is a parallelogram with 4 right angles, so every rectangles are also parallelograms and also quadrilaterals. On the other hand, not all quadrilaterals and parallelograms are rectangles.

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

The diagonals intersect at best angles. A ** square ** have the right to be characterized as a rhombus which is additionally a rectangle – in various other words, a parallel with 4 congruent sides and also four best angles.

A ** trapezoid ** is a square with exactly one pair that parallel sides. (There may be some confusion around this word relying on which country you"re in. In India and also Britain, they say ** trapezium ** ; in America, trapezium usually way a quadrilateral with no parallel sides.)

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

A ** kite ** is a square with exactly two bag of nearby congruent sides. (This definition excludes rhombi. Some textbooks speak a kite contends least 2 pairs of surrounding congruent sides, so 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 classification

The complying with Venn Diagram shows the inclusions and also intersections that the various types of quadrilaterals.