《切线长定理》导学案湘教版(2020年最新)

132.5.31.2..1.2.3.OPO.?P______.1..2..O23=70.P=________.POPAPBOABPA=PB=4cmP=40CABCOPAPBDE1PDE2DOE.AEDFCBO331.PCOCPOOAAPCDCDDP=12AD=2cmO.2.POPAPBOABBC.1ACOP2APC=70AC3.PAPBOABOAB=30.1APB2OA=3AP.