BASIC
GEOMETRY CONCEPTS AND DEFINITIONS.
*Geometry: It is an area of knowledse wich studies any elements and
operations on the plane such as points.
*Points: In geometry a point can be defined as a place or location where
two lines interest. A point hasn’t got dimension no height and not width.
*Line: A one dimensional object formed of infinite point.It has not end,
and continuous on forever in a plane.
*Ray: A line wich begin at a
point (called end-point) and extends
endlessly in one direction.
*Mind point: It is a point that is halfway between the endspoints of the
line segment.
*Line segment: It is aline with two wndpoints.
*Length: Measurenment of something from end point.
GEOMETRY DRAWING AND SUPRELIES CONCEPTS AND DEFINITIONS
*Freehand: Draw by hand without guiding instruments , measurements,…
*Line/ Technical drawing: It is a drawing made with the help ok
supplies. It is usually the king of drawing used for architecture or enginer
plans.
*Compass:It is a tool for drawing circles and arcs,also for measuring
elistances between point, consisting for two arms likenby a hinge.
*Protactor: An instrument for measuring of drawing angleson paper,
usually a flat semicircular transparent plastic sheet graduated in degrees.
*Set Squares (UK) /Triangles (USA): They are two sprcial ruler with a
triangular shapes.
*Eraser: An object ,used for deleting mistakes.
*Ruler : It is the element you
need for take a measure.
IMPORTANT DEFINITIONS ABOUT CIRCLES
*Circle: Set of points
a at the same distance (equidistance) to a point called center (the
line)
*Circunference: It is the full lenght of a circle (the
comple ).
*Center: It is the point equidistance to any of the
point on a circle.
*Radious: It is the length of a line segment from the
enter to perimeter.
*Diameter: It is a line segment that pases throught
the center and connects two points of a circle.
*Chord: A line segment wich connects two points of the
circle but don’t pass to the center.
*Arc: It is a line segment of a circle.
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