Question

1. if you rotate all the letters 90°, which ones exhibit rotational symmetry?

Explanation:

Step1: Understand rotational symmetry

Rotational symmetry means a shape looks the same after a rotation. When rotating letters 90°, we check each letter.

Step2: Analyze letters

Letters like O and X have rotational symmetry when rotated 90°. For example, O looks the same after a 90 - degree rotation as it is a circle - like shape and X has intersecting lines that make it look the same after 90 - degree rotation.

Answer:

Letters like O and X.