BASIC GEOMETRY CONCEPTS

Geometry: is a subject studies operations in points,lines and shapes.
Point: is the place where two lines intersect.
Ray: is the direction of the line.
Line: is a right infinite.
End point: a line that only have end.
Line segment:  a line with two endpoints.

DEFINITIONS ABOUT ANGLES AND LINE.

Parallels: two lines which never intersect.
Perpendicular: they are lines which intersect forming four right angles.
Oblique: they are lines which are not parallels and perpendicular.
Angle: it is a figure formed by two rays.
Vertex:  vértice

CLASIFICATE ABERTUR.

Right: two lines intersect forming an angle of 90 grades.

Obtuse: two lines intersect forming an angle of + 90 grades.

Acute: two lines intersect forming an angles of- 90 grades.

Flat: angle of 180 grades.

CLASIFICATE TWO ANGLES 

Complementary: forming 90 grades.

Suplementary: forming 180 grades.

Adyacent: they are angles that share one side and a vertex.