Reflective symmetry, also known as mirror symmetry, occurs when one half of an object is a mirror image of the other half. This means that if you were to draw a line, called the line of symmetry, through the object, both sides would look identical. Common examples of reflective symmetry can be found in nature, such as in the wings of a butterfly or the human face. In mathematics, reflective symmetry is often studied in geometry. Shapes like squares, circles, and triangles can exhibit this type of symmetry. For instance, a square has four lines of symmetry, while a circle has an infinite number of lines of symmetry, making them perfect examples of reflective symmetry in different contexts.