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A quadrilateral is a plane shape bounded by four straight sides, meeting pairwise at four vertices. The sides can be of any length whatsoever, and the angles formed can have any measure - except that they must sum to 360 degrees.
A rhombus is a special kind of quadrilateral in which all four sides are of equal length, but none of the angles is a right angle (otherwise it would be a square).
Some results follow from the above: there are two pairs of parallel sides, adjacent angles are supplementary, the diagonals bisect one another at right angles.
A rhombus could be defined instead, in terms of parallel sides and supplementary angles and then the equal sides would be a consequence.
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What is the difference between a rhombus and an irregular quadrilateral?
A rhombus is an irregular quadrilateral and so, to that extent there is no difference. However, a rhombus does have sides of equal length which is not true of all irregular quadrilaterals.
Is a rhombus a quadrilateral of a square?
A rhombus is a quadrilateral.
What does a rhombus need to be a quadrilateral?
A rhombus is a quadrilateral because it has four sides. A quadrilateral with four equal sides is a rhombus.
A quadrilateral is a rhombus?
Yes. A rhombus is defined as a quadrilateral (a 4-sided figure) with some additional properties. Specifically, all four sides are the same length. This also implies that opposite sides are parallel.
Is a quadrilateral alwayssometimes or never a rhombus?
A rhombus is a quadrilateral, but all quadrilaterals are not rhombus'. So sometimes would be your answer.
