GEOMETRY WORDS´ DESCRIPTION

Geometry: Is the science wich studies the points, lines and shapes. It comes from the Greek "geo", "earth" and "metry".

  point: Is the place where two lines intersect. The point has no dimensions, no height and no width.

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Line: It´s an infinit ray.

Ray: Is a ray that only have end on one side. (semirrecta)

Freehand: Draw something without any instruments.

Compass: Instrument use to do circles and arcs.

End point: It´s a point that finish or starts a line or a line segment.

Mediatriz: Line that divide a line segment in two same parts. 

DEFINITIONS ABOUT ANGLES AND LINES

Parallels: Two lines that never intersect. All points are equal distances.

Perpendiculars: Two lines that intersect forming four 90º angles or right angles.

Obliques: Two lines that intersect and there aren´t parallels and perpendiculars.

Angle: It´s a figure of two lines sharing a common endpoint (vertex). 

CLASIFICATE ABERTUR

Right: Two lines that intersect forming an 90º angle.

Obtuse: Two lines that intersect forming an >90º angle.

Acute: Two lines that intersect forming an <90º angle.

Flat: Two lines that intersect forming an 180º angle.
Complet: Two lines that make a 360º angle.
Nule: A not movement angle.

Complementary angles: Two angles that form 90º.
Suplementary angles: Two angles that form 180º.