Question

A. It has no reflectional symmetry. B. It has rotational symmetry with an angle of rotation of 90°. C. It has reflectional symmetry with one line of symmetry. D. It has no rotational symmetry.

Answer 1

Radial symmetry is a type of symmetry found in organisms where multiple planes of symmetry can be drawn through a central point. The organism can be divided into identical halves, like a pie.

Step-by-step explanation:

Radial symmetry is a type of symmetry found in organisms where multiple planes of symmetry can be drawn through a central point. The organism can be divided into identical halves, like a pie. Examples of organisms with radial symmetry include sea anemones and jellyfish.

On the other hand, bilateral symmetry is a type of symmetry where a single plane of symmetry divides the organism into two mirror-image halves. This means that if the organism is cut along this plane, the resulting halves will be similar but not identical. Examples of organisms with bilateral symmetry include goats and butterflies.

Based on the given options, it can be concluded that the organism described has radial symmetry (Option B), as it has multiple planes of symmetry through a central point.

Answer 2

The figure has a rotational symmetry with an angle of rotation of 90°, so the correct option is B.

Step-by-step explanation:

i) The figure depicts a form with four lines of reflectional symmetry. There are four lines of symmetry that, when drawn, split the form into two identical halves.

If one of the halves were to be folded over the line of symmetry, the other half would be produced perfectly.

As a result, neither Option A. nor Option D. are true.

ii) It possesses point symmetry, meaning that even when rotated by 180 degrees, the form remains unchanged. Option C.) is thus untrue.

iii) The form possesses rotational symmetry since it seems to remain unaltered when rotated in any direction between 0 and 360 degrees.

Thus, B is the appropriate choices.