How Many Lines of Symmetry Does a Trapezoid Have

A trapezoid has two parallel sides (bases) and two non-parallel sides (legs). Generally a trapezoid has the four sides which are unequal. So it does not have any line of symmetry.

How many lines of symmetry does an isosceles trapezoid have?

An isosceles trapezoid has only one line of symmetry. It runs through the midpoints of its parallel sides (bases). Since an isosceles trapezoid has congruent legs, it serves the scope to have only one line of symmetry.