Graphic inequalities 2D
    
      --- Introduction ---
    
  
 
The inequalities have a geometrical meaning: for example one
  or several inequalities on two variables x and y describe a region 
  in the cartesian plane.
This online exercise helps you to establish the link between
 the inequalities and plane regions. It can either plot a region and ask you 
 to recognize the corresponding inequality among a list to choose from,
 or give an inequality and ask you to recognize the plane region it describes.
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    - Description: recognize a plane region described by inequalities. interactive exercises, online calculators and plotters, mathematical recreation and games
 
    - Keywords: interactive mathematics, interactive math, server side interactivity, analysis, geometry, inequalities, conics, triangles,graphing