A shape with one line of reflection symmetry is a kite. In a kite, one diagonal divides the shape into two mirror-image halves, while the other diagonal does not create symmetry. This single line of symmetry runs through the vertices where the two pairs of equal-length sides meet. Such shapes can often be found in everyday objects, like certain types of decorative items or even some animal forms.
An isosceles triangle has one line of symmetry
An irregular pentagon.
a Square.
The letter D!
An isosceles triangle has one line of symmetry
An isosceles triangle has 1 line of symmetry
An isosceles triangle has one line of symmetry
An isosceles triangle has one line of symmetry
a heart
Trapezium
the shape is a heart.
Isosceles triangle
scalene triangle.
a pentagon
An irregular pentagon.
You cannot have one parallel line. There must be another line that it is parallel to. Also, 1 symmetry is meaningless - you can have one axis of symmetry or rotational symmetry of order one. The answer will depend on which one it is.
well it has 1 line but it depends on the shape of the rhombus