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Line EF is a parallel line to line BC.Point A and D are on line EF.Point M and N are the mid-points. AD=ED-EA Move point D to find the geometric quality of the lengthes (AD, BC, MN) . @You can also move points (A, B, C, D, E, F) on CABRI. @Download CABRIU data (d24) from here.  |
