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Level coordinate system Coordinate systems are indispensable aids, if one wants to solve geometrical problems with computational means or vice versa wants to interpret geometrically the results, which resulted from the treatment of certain problems with computational methods  Domyhomework will do your assignments . In this sense, coordinate systems are, as it were, links between geometry and arithmetic, which, moreover, often make it possible in the first place to make certain practical, "extramathematical" facts accessible to mathematical processing, to "model" them mathematically. A coordinate system of the plane consists of two number lines intersecting each other in the zero point  the coordinate origin O , whereby one line is called abscissa axis (as a rule also xaxis), the other one ordinate axis (as a rule also yaxis). On each axis a coordinate unit point different from O is defined. If the two axes are perpendicular to each other, they form a rectangular coordinate system  algebra homework help . A Cartesian coordinate system exists if, in addition, the unit distances on both axes are the same in a rectangular coordinate system. It is determined that the directed xaxis changes into the directed yaxis on the shortest way when rotating counterclockwise (thus in the mathematically positive direction of rotation). One says then: The x and the yaxis form a right system. With the help of a coordinate system, each point P of the plane can be uniquely assigned an ordered pair of numbers  accounting homework helper  the coordinates of this point. The first coordinate (xcoordinate, xvalue or absizissi of P) indicates how far away the point P is from the right or left of the yaxis. The second coordinate (ycoordinate, yvalue or ordinate of P) tells how far P lies above or below the xaxis. Conversely, for each pair of numbers (x; y) there is a point P in the plane which is uniquely determined by this and which then has the coordinates x and y (interactive calculation example). By each of the coordinate systems described above the plane is divided into four quadrants. It is valid for the points of the I. quadrant: x > 0 and y > 0, Useful Resources: 

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