If two lines are parallel then the area of the plane between them is symmetrical about its centre-line (parallel to and mid-way between the boundary lines).
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It has two 5-tuples and 5 pairs of parallel lines. It need not have any line of symmetry.
No but it does have an horizontal line of symmetry
A trapezoid is a quadrilateral that sometimes has a line of symmetry but not always. A trapezoid can have a line of symmetry if it is an isosceles trapezoid, where the non-parallel sides are congruent. However, in a general trapezoid where the non-parallel sides are not equal in length, there is no line of symmetry. This distinction is important in understanding the properties of different types of quadrilaterals.
No but it does have parallel line segments of different lengths and 1 line of symmetry
Trapezoid