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

A parallelogram likewise has the complying with properties:

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

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

The diagonals are congruent.

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

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

The diagonals intersect at appropriate angles. A ** square ** can be identified as a rhombus which is likewise a rectangle – in other words, a parallelogram with four congruent sides and four ideal angles.

A ** trapezoid ** is a quadrilateral with precisely one pair of parallel sides. (There may be part confusion around this word relying on which nation you"re in. In India and Britain, they speak ** trapezium ** ; in America, trapezium usually way a quadrilateral through no parallel sides.)

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

A ** kite ** is a square with precisely two pairs of adjacent congruent sides. (This meaning excludes rhombi. Some textbooks speak a kite contends least two pairs of adjacent congruent sides, so a rhombus is a special situation of a kite.)

A ** scalene ** quadrilateral is a four-sided polygon that has no congruent sides. Three instances are presented below.

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## Venn diagram of Quadrilateral category

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