👉 A symmetrian is a geometric object that can be interpreted as a combination of two or more shapes, where each shape is congruent to its mirror image. This concept arises from the symmetry in nature and is often used in geometry, such as in three-dimensional space. For example, consider the triangle ABC in 3D space. The point P is reflected across line AB, resulting in a new triangle PBC. Similarly, the reflection of the triangle PBC across line BC also results