There are many. An isosceles triangle, for example.
The letter T for example
An equilateral triangle has six symmetries, and an isosceles triangle has two. An isosceles triangle has a single axis of symmetry, the perpendicular bisector of the non-congruent side. This is a reflection symmetry. An equilateral triangle has rotational symmetry as well as reflection symmetry. It is invariant under rotations by 120 degrees.
A parallelogram normally has no lines of symmetry unless it is in the shape of a rectangle which will then give it 2 lines of symmetry
A square, a paralellogram, a trapezoid, a circle, a rectangle, a rhombus.
Reflection symmetry, reflectional symmetry, line symmetry, mirror symmetry, mirror-image symmetry, or bilateral symmetry is symmetry with respect to reflection
It depends on the shape!
The letter T for example
An equilateral triangle has six symmetries, and an isosceles triangle has two. An isosceles triangle has a single axis of symmetry, the perpendicular bisector of the non-congruent side. This is a reflection symmetry. An equilateral triangle has rotational symmetry as well as reflection symmetry. It is invariant under rotations by 120 degrees.
A parallelogram normally has no lines of symmetry unless it is in the shape of a rectangle which will then give it 2 lines of symmetry
Because linear symmetry defines a line such that the shape is unchanged when REFLECTED in that line.
A square, a paralellogram, a trapezoid, a circle, a rectangle, a rhombus.
Reflection symmetry, reflectional symmetry, line symmetry, mirror symmetry, mirror-image symmetry, or bilateral symmetry is symmetry with respect to reflection
No. You can reflect any shape about a line but if the resulting image is not the same as the original, that line is not a line of symmetry.
None - it has rotational symmetry - not reflection symmetry.
Not always. It depends where the line of symmetry is located.
A rectangle is one of them
reflection