Dots

The following example illustrates the use of the tools PARAMETERS and  POINTS. Two parameters X and Y are defined (notice the use of capital letters to avoid the names x and y which are reserved to be used for the x and y variables which play a special role in FUNCTIONS and EQUATIONS). Also a point   P with coordinates X and Y is defined. At the bottom line of the applet two controls appear through which the values of  X and Y may be modified, either by clicking on the little arrows to increase or decrease the value or by writing the desired value on the text field and typing <return>. The changes on X and Y are reflected on the position of  P. While maintaining the left button pressed over one arrow the value change repeatedly and the point P moves.  

On this applet a pupil may be asked to move the point P to some specified position by modifying the values of the coordinates X and Y. Also some fixed points A, B, C and D may be added, as it is done in the next applet, and the student may be asked to make P coincide with each of these points and in this way he or she will obtain the coordinates of the fixed points:

The reader should click the config button and look at the configurations of PARAMETERS and POINTS to see how this particular configuration was achieved. 

Introduction  Appetizer  Examples  Documentation  Applications  Work plan

	Ministerio de Educación, Cultura y Deporte. Aņo 2000