Yes
A rhombus
A kite, for example.
parallelogram
Irregular quadrilateral
YES, a quadrilateral does have a line of symmetry.
There is no quadrilateralthat has 1 line of symmetry as quadrilaterals have to have at least 1 line of symmetry.
An isosceles trapezium.
A quadrilateral is a shape with four sides.
Yes
A rhombus
A kite, for example.
A parallelogram has no lines of symmetry, but it has rotational symmetry.
parallelogram
Irregular quadrilateral
nonagon
Yes - some trapezoids can have one line of symmetry.