Geometry: It´s the study
points,lines or shapes.
Point: A point can be defined where two lines
intersect.A point has no dimensions.
Line: It´s susesion points infinit.
Ray: It´s a line that only
have and in one line.
End point: It´s a line segment or
ray ends or stars.
Midpoint: It´s between the
endpoints of the line segment.
Line segment: It´s a line with two
endpoints.
Straight line: It´s a line whose points
follow the same direction.
Plane: It´s a two dimensional.It can defined two
parallel lines.
Lenght: Measurement of something from end to end.
Parallels:Two lines never intersect.
Perpendicular: Two lines forming two right angle 90º
angle.
Oblique: It´s a line that it isn´t parallel and
perpendicular.
Angle:Two lines that have one
point common.
Right: Two lines intersect 90º.
Obtuse: Two lines intersect more 90º.
Acule: Two lines intersect less
90º.
Flat: Angle 180º.
DEFINITIONS ABOUT CIRCLES
Circle: set of points at the same distance to the center.
Circumference: it's the full length of a circle. The complete distance a round a circle is the perimeter.
Center: point equidistant to any of the points of a circle.
Radius: it´s a line from the center and the perimeter.
Diameter: line segment that goes from a point of the perimeter to another point, passing for the center of the circle.
Chord: line that connects two points of the circle not through the center.
Arc: segment of a circle.
Arrow: segment that divides an arc in the middle. It´s the center of the chord.
Tangent: line that only touch a point of a circle.
Outer: element that doesn´t touch the circunference.
Inner: element inside the circumference.
Concentric circles: circles with different radius but place in the plane sharing the center.
