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How would you prove algebraically that the function: f(x)= |x-2|, x<= 2 , is one to one?
This would be a real bear to prove, mainly because it's not true.
irregular shape! :D x x x x x x x x x x x x
You can prove by making two or more identical triangles.Congruence means when two figures have the same size, form, and shape.
A sheet of A4 paper could be classed as a plane 2D shape, as it has length x width. A shoebox is an example of a 3D shape, as it has length x width x depth.