SYMMETRY

SYMMETRY: It is a quality of some shapes which some of their parts are reflections of others.

SYMMETRY AXIS: It is a line which divides a shape into two symmetric halves. Symmetric points are on a perpendicular line to it.

REFLECTION SYMMETRY: It is a shapes quality which is formed by two halves facing each other with an axis or fold line in between as if both sides where a mirrror images of each other.

CENTRAL SYMMETRY: It is the reflection of an object through a point called the symmetry center. Symmetric pair of points are colinear with the center.

TEXTURE

TEXTURE: it is the visual and tactile quality of the surfaces due to the material.

ARTIFICIAL TEXTURES: are those created by the human being manually or menically.

RUBBING TECHNIQUE: it consists on fractioning or rubbing a crayon.

 TACTILE TEXTURES: are those that can be perceived through the sense of the touch.

VISUAL TEXTURES: those which can only be perceived through the sense of sight.

NATURAL TEXTURES: those that can be found in nature.