Answer with explanation:
The Meaning of term Rotational Symmetry is , when a geometrical shape is rotated by an Angle , the Original Pre-image and Image appear Congruent.
For example, when you rotate a Square through a complete revolution that is through an angle of 360°, it appears congruent to it's Original Preimage four times , that is each time when it is rotated by angle of 90°.
So,Order of rotational Symmetry = 4
For a line segment , end points are important while considering Rotational Symmetry.
⇒⇒⇒For a Geometrical Shape, having 1 or infinite order of symmetry
1. End Point is not a Figure that is not a geometrical shape.
2. Point of Symmetry is a Figure because we can call a point a geometrical shape.And in the context of Rotational Symmetry the term is often used.
3. Midpoint is also a Figure because we can call a point a geometrical shape but in context of rotational symmetry the term mid point does not come into consideration.
4.Point of congruence is also a Figure because we can call a point a geometrical shape but from the point of view of rotational symmetry, the term Point of congruence does not make any sense.
Option B →Point of symmetry
is a figure rotated about in rotational symmetry.
