A line of symmetry is a line that cuts a shape exactly in half. This means that if you were to fold the shape along the line, both halves would match exactly. Equally, if you were to place a mirror along the line, the shape would remain unchanged. The shape which it is not possible to divide into equal halves is the answer Kite Isosceles Triangle Trapezium Isosceles Trapezium Rhombus Trapezium has no symmetry except isosceles trapezium but since the question didn't specify that the trapezium is isosceles, then the answer is Trapezium