取CD的中点M,连接OM,OM是CD的弦心距,OM垂直于CD,AE垂直于CD,
根据三角形相似,OM/AE=OP/AP=OP/(10+OP),整理得OP=10OM/(AE-OM)
OM垂直于CD,BF垂直于CD,根据三角形相似
OM/BF=OP/PB,OM/BF=OP/(10-OP),
将OP=10OM/(AE-OM)代入上面的关系式中,
OM/BF=OM/(AE-2OM)
BF=AE-2OM,
AE-BF=2OM
取CD的中点M,连接OM,OM是CD的弦心距,OM垂直于CD,AE垂直于CD,
根据三角形相似,OM/AE=OP/AP=OP/(10+OP),整理得OP=10OM/(AE-OM)
OM垂直于CD,BF垂直于CD,根据三角形相似
OM/BF=OP/PB,OM/BF=OP/(10-OP),
将OP=10OM/(AE-OM)代入上面的关系式中,
OM/BF=OM/(AE-2OM)
BF=AE-2OM,
AE-BF=2OM