peegelsümmeetriat

Peegelsümmeetria, also known as reflectional symmetry, is a fundamental concept in geometry. An object or a figure exhibits peegelsümmeetria if it can be divided by a line or a plane, called the axis of symmetry or plane of symmetry, such that the two halves are mirror images of each other. When reflected across this axis or plane, the object perfectly overlaps with its original position.

In two dimensions, peegelsümmeetria is characterized by a line of symmetry. For example, a square has four lines of symmetry, while an isosceles triangle has one. A circle possesses an infinite number of lines of symmetry, as any diameter can serve as an axis of symmetry. This type of symmetry is common in nature, seen in the wings of butterflies, the petals of flowers, and the human face.

In three dimensions, peegelsümmeetria is defined by a plane of symmetry. A sphere, for instance, has an infinite number of planes of symmetry passing through its center. A cube has nine planes of symmetry. Many man-made objects, such as cars and furniture, are designed with peegelsümmeetria for aesthetic and functional reasons. The presence of peegelsümmeetria often contributes to a sense of balance and order.