SYMMETRY

Symmetry: It is a quality of some shapeswich some of theim parts are relections of others.

Reflection symmetry: It is a shape quality wich is formed by two halves faring each other with an axis or fold linesin between as if both sides were mirror images of each other.

Symmetry axis: It is a line wich divides a shape into two symmetric halves. Every elements of the shapes is reflected in the other side and the same distance from the axis.

Central symmetry: It is the refection of an object through a point called in the symmetry center in the symmetry center. Symmetric pair of points are collinear with the center.