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The following is a simple way to divided any triangle into n^2 congruent triangles (n > 1):Divide each side of the triangle into n equal parts,Select a pair of lines and join pairs of the above division marks with lines which will be parallel to the third side.Repeat step 2 with the other two pair of lines.
equilateral triangle ;)
step 1: make a circle with a compass step 2: divide the circle into 4 equal parts step 3: draw curved lines
scratching lines into a sheet of copper
The answer depends on how you number the steps: there is no universally agreed system.