THE SYMMETRY

The symmetry: it´s a equality of some shapes.Which some of their parts are reflections of others.
Reflection symmetry: it is shape´s quality which is formed by two sames halves.
Symmetry axis: it is the line which divides a shape into two symmetric halves.
Central symmetry: it´s the reflection of an object through a point called symmetry center.Every symmetric point is on the other side and at the same distance  from the center of symmetry.
Geometric symmetry: it is a kind of symmetry that have geometric rules.
Apparent symmetry:  it´s a symmetry that looks like a real symmetry, but there isn´t a real symmetry because there are little things that there are not the same in one of two halves.
Symmetry balance: it´s a way to organize  parts of an image,picture or drawing.