Current location - Training Enrollment Network - Mathematics courses - 22. (2) Mathematics examination questions of Wuhan senior high school entrance examination in 2008
22. (2) Mathematics examination questions of Wuhan senior high school entrance examination in 2008
Connect OD, DB, CB and over d as DG⊥AB in g.

C, D is on ⊙O, AB is the diameter, DE is the tangent of ⊙O, DE⊥AE.

∴AC⊥BC AD⊥BD DE⊥OD

∴AE‖OD BC

△ ADB △ AGD △ AGD = △ AED △ AEF △ DOF

AF:DF=AE:OD AG=AE

AC:OG=AB:OD=2: 1

∫AC:AB = 3:5

∴OG:AO=3:5

AG:AO=8:5

AO=OD

Silver: outside diameter =8:5

AF:DF=8:5