indefinite
POINT
A point has only location in space.
is the indivisible unity of geometry.
not have dimension (length, height, width)
ONLINE
Online is a geometric figure that is generated by a moving point.
STRAIGHT
If the point moves without changing direction, then it is a straight line.
IS THE INFINITE IS STRAIGHT?
course the lines are endless so in geometry trbaja with "pieces" or "pieces" of a line called: line segments.
HOW TO JOIN TWO POINTS?
To join two points, we can use many different types of lines. Of these, the shorter the straight line. A line consists of infinite points and has no beginning or end.
CURVE ONLINE
If the point is constantly changing direction then it is a curved line.
A line can be straight, curved or in combination. Any line can be extended without limit .
PLANE A plane is a surface that has length and width but no thickness.
The plane has two dimensions Unlike most cases that are around us in three dimensions.
studied plane geometry such as triangles, quadrilaterals, circle, circle ...
In other words studied plane geometry plane figures (polygons).
Cartesian diagrams
These diagrams were created by Rene Descartes, also known as Descartes, hence these diagrams are called Cartesian diagrams denominated.
A Cartesian plot is to divide the plane into four parts called quadrants by two perpendicular lines (horizontal and vertical respectively). These lines intersect at a point called the origin of coordinates.
These lines are named: the horizontal line (called "horizontal axis" or "x-axis) and the vertical line (called" vertical axis "or" y-axis ").
What is an ordered pair?
Here is an example in the figure above: the point of coordinates (2.3) is located placing us at the point marked with 2 in the axis "x" and once here, we went straight up parallel to the axis "y", to the place marked on the shaft 3, that is the point sought.
What is a Cartesian product?
If we have two sets A and B, and try to assemble all possible pairs formed by an element of set A and an element of set B, we get the Cartesian product of two sets. It is written:
can be represented in different ways: diagrams of arrows, diagrams, trees, tables and graphs Cartesian. Each pair we form with an element of A and one B, in that order, called the ordered pair.
ANGLES
The word angle comes from word "knee" in Greek.
An angle is the portion of the plane bounded by two rays originating from the same point. The rays are called initial and final hand. The common origin is called the vertex of the angle. An angle can be located anywhere in the plane, but sometimes it will be useful to move to a Cartesian coordinate system so that the vertex of the angle falls on the origin of coordinates and the initial side on the positive axis of abscissas.
Two rays form an angle. The point is the vertex.
The angle is denoted by one letter the Greek alphabet.
know the Greek alphabet:
http://personal5.iddeo.es/ztt/pra/alfabeto_griego.htm
kind of angle
The angle is 90 ° is called the rectum. Which is less than 90 degrees is a sharp Angil which is larger than 90 ° is an obtuse angle. Angles measure 180 degrees flat.
But you can measure angles with your fist do not you think? Click on:
http://www.experimentar.gov.ar/newexperi/NOTAS/planetatierra/lunaexploracion.htm
the sexagesimal
To measure the angles used the sexagesimal system what cocnsiste this system?. This system was known in ancient Babylon, and consists of dividing a circle into 360 equal parts. Each of these parts is called degree (º). A quarter, or one quadrant, measured 90 ° Easy! No?
To measure the angles used conveyor.
But you can make a "paper carrier" that will serve you in cases emergency, to measure some angles. OK.
http://www.cientec.or.cr/matematica/origami/transportador.html
Building a
geoboard
Tupuedes touch the lines and build their own sites and con0ocer the areas of squares, rectangles and triangles ... just build a geoboard.
need a table of about 30x30 cm. You have to do with a pencil, a grid on the table (6x6, 7x7x, 8x8, depending on size of timber you have.) Then you have to put a nail in each of the intersections. Now you can build the sites you want to color links ... That's it! Simple and very useful!
virtual geoboard Download:
http://www .colombiaaprende.edu.co/html/mediateca/1607/article-73593.html
You must have Win Zip program.
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