发布网友 发布时间:2024-10-24 13:07
共2个回答
热心网友 时间:2024-11-07 01:58
如下图。
热心网友 时间:2024-11-07 01:55
BD/sin角BAD=AB/sin角ADB
BD=AB*sin角BAD/sin角ABD
CD/sin角CAD=AB/sin角ADC
CD=AB*sin角CAD/sin角ADC
AB-BD-(AC-CD)=AB(1-sin角BAD/sin角ABD)-AC(1-sin角CAD/sin角ADC)=(AB-AC)((1-sin角CAD/sin角ADC)>0
AB-BD>AC-CD
AB-AC>BD-CD