Can you build an equilateral triangle?[br][br][br]

Try typing in the input [img width=176,height=43]data:image/png;base64,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[/img]: [br]D=(0,0) (aperte [i]ENTER)[br][/i]E=(2,0) (aperte[i] [i]ENTER)[br][/i][/i]F=(1,sqrt(3)) (press [i]ENTER[/i])*[br]What can you see?[br]* SQRT is the square root[br]