GSPk F(! capmdtBb< # CoordSys4$$XX -Written by Michael Buescher mbuescher@hb.edut=0O ȟ  O`.BuSlide point D along the directrix. The red line is the perpendicular bisector of the segment joining D to the focus.tfocusʣT@T T@N@ X' T?'CdC tp+u0/Bas J K KLLMMNNOq,,BC t7C33344444455555556CC t/?directrix7  l dBCCC`?tQVx> DIIIJJJJJ J K K K K L L L L ?wCRC  tVJkaTsMLMMMLLLLLLKKKK?wCRCCdC?t <E@@@@@@????>>>>>>=СCɍC tK3l76666665555555444LQCyCxkC٧C? "Arial