Which of these figures has rotational symmetry?

Which of these figures has rotational symmetry?

A. trapezoid

B. rhombus

C. scalene triangle

D. isoceles triangle

The answer is B. Rhombus, which it's rotational symmetry is 90 degrees.

Answer with explanation:

The Meaning of the two combined words "Rotational symmetry" is when we rotate any geometrical shape through a complete circle, that is at Different positions through different angles, number of times it looks Congruent to original geometrical shape, that will be equal to total number of rotational symmetry of that geometrical shape.

⇒Diagonals of rhombus bisect each other at right angles, so through Diagonals we can find it's Reflectional Symmetry.

⇒If we rotate the Rhombus through 180°, at two positions it will be Congruent to it's Original Shape. So, total number of rotational symmetry of Rhombus = 2

⇒Out of four Options, Rhombus has only rotational symmetry.

Option B