Question 16

Explanation

Let's analyze each plane figure based on rotational symmetry and reflectional symmetry.

Explanation

Regular octagon

• Rotational symmetry $8$ (can be rotated at $45^\circ, 90^\circ, 135^\circ, \ldots, 315^\circ$).
• Reflectional symmetry $8$ (through diagonals and midlines).

Rhombus that is not a square

• Rotational symmetry $2$ (initial position and $180^\circ$ rotation).
• Reflectional symmetry $2$ (through both diagonals).

Isosceles triangle that is not equilateral

• Rotational symmetry $1$ (only initial position).
• Reflectional symmetry $1$ (through the height from the apex angle).

Kite that is not a square

• Rotational symmetry $1$ (only initial position).
• Reflectional symmetry $1$ (through one of the diagonals).

Conclusion

There are no figures that have more rotational symmetries than reflectional symmetries. All figures have the same number of rotational symmetries as reflectional symmetries or fewer.

Thus, the answer is $0$.