Friday 27 October 2017

HALLOWEEN


Halloween’s origins date back to the ancient Celtic festival of Samhain (pronounced sow-in). The Celts, who lived 2,000 years ago in the area that is now Ireland, the United Kingdom and northern France, celebrated their new year on November 1. 

This day marked the end of summer and the harvest and the beginning of the dark, cold winter, a time of year that was often associated with human death. Celts believed that on the night before the new year, the boundary between the worlds of the living and the dead became blurred. On the night of October 31 they celebrated Samhain, when it was believed that the ghosts of the dead returned to earth. 

In addition to causing trouble and damaging crops, Celts thought that the presence of the otherworldly spirits made it easier for the Druids, or Celtic priests, to make predictions about the future. For a people entirely dependent on the volatile natural world, these prophecies were an important source of comfort and direction during the long, dark winter.

To commemorate the event, Druids built huge sacred bonfires, where the people gathered to burn crops and animals as sacrifices to the Celtic deities. During the celebration, the Celts wore costumes, typically consisting of animal heads and skins, and attempted to tell each other’s fortunes. 

When the celebration was over, they re-lit their hearth fires, which they had extinguished earlier that evening, from the sacred bonfire to help protect them during the coming winter.

Wednesday 25 October 2017

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.
                           +           .              o
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.