A quadrilateral doesn't have to have any pairs of parallel lines. It depends what kind of quadrilateral you are talking about...
Rectangle- Yes (2 pairs)
Square- Yes (2 pairs)
Trapezoid- Yes (1 pair)
Parallelogram- Yes (2 pairs)
Rhombus- Yes (2 pairs)
A rectangle, by definition is an irregular quadrilateral. It has two pairs of parallel sides.
An irregular quadrilateral can have zero, one, or two pairs of parallel lines, but typically it has no parallel lines. By definition, an irregular quadrilateral does not have equal sides or angles, which means it does not conform to the properties of specific types of quadrilaterals like rectangles or parallelograms that have parallel sides. Thus, the most common scenario for an irregular quadrilateral is having no parallel lines at all.
That depends on witch quadrilateral your talking about.
A diamond has two pairs of parallel lines.
A quadrilateral is any figure with 4 sides. ("quad" = 4, "latus" = side). It doesn't have to have any parallel lines. If it happens to have two sides that are parallel, then it's a trapezoid. If it happens to have two pairs of parallel sides, then it's a parallelogram. Common parallelograms are rectangles, squares, and kites.
one
A quadrilateral has 4 sides, 2 in which never intersect. Therefore, the lines that don't intersect are called parallel. There are 4 parallel sides but has 2 pairs of parallel sides.
A rectangle, by definition is an irregular quadrilateral. It has two pairs of parallel sides.
A trapezoid is a four sided quadrilateral that has only one pair of opposite parallel lines of different lengths.
If it has 2 pairs of parallel lines it is a parallelogram, if it is a quadrilateral. If there is not restrictions on the number of sides, then there are many answers
That depends on witch quadrilateral your talking about.
A diamond has two pairs of parallel lines.
A rhombus has 2 pairs of parallel lines.
A regular dodecagon has six pairs of parallel lines.
it has 2 pairs of parallel lines
A pentagon has no parallel lines.
it has too parallel lines!