Which of the following is a figure rotated about in rotational symmetry?

a. endpoint
b. point of symmetry
c. midpoint
d. point of congruency

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.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.