Some types of quadrilaterals don't have parallel sides. Such as a diamond or a kite.
Parallel sides are sides that (in a plane) do not meet whereas sides which are not parallel do meet at some point at an angle greater than 0°.
Trapezoids have only one pair of parallel sides. A parallelogram has two pair of parallel sides.
Not necessarily; A square, rectangle, rhombus, parallelogram all have some parallel sides, but a kite does not have any.
A hexagon (6 sides) has three sets of parallel sides.
Some types of quadrilaterals don't have parallel sides. Such as a diamond or a kite.
Parallel sides are sides that (in a plane) do not meet whereas sides which are not parallel do meet at some point at an angle greater than 0°.
no some shapes like the rhombus have 4 sides making it a quadrilateral but 2 of its sides are not parallel
Nope it has to be a shape to have parallel sides and even then some don't
Yes
Yes. All of them do, but the trapezoid is the only one with only one pair of parallel sides.
Quadrilaterals usually have special names only if they DO have parallel sides, or some other special property. You might just call it "quadrilateral", or "a quadrilateral with no parallel sides".
Trapezoids have only one pair of parallel sides. A parallelogram has two pair of parallel sides.
Not necessarily; A square, rectangle, rhombus, parallelogram all have some parallel sides, but a kite does not have any.
A square has four parallel sides (two pairs of parallel sides).
A hexagon (6 sides) has three sets of parallel sides.
No. The sides of a cylinder are not parallel.