ä¸è§å½¢AEFä¸ABCç¸ä¼¼ï¼ä¸è§å½¢AKFä¸ADCç¸ä¼¼ï¼
æ以EF/BC=AF/AC, AK/AD=AF/AC
å¾EF/BC=AK/AD
设ï¼FH为xï¼åAKï¼8-xï¼ EFï¼15/x
å¯åæ¹ç¨ï¼
(15/x)/10=(8-x)/8
x=6 or 2
å ç©å½¢ä¸º: HF=6, EF=2.5
or: HF=2, EF=7.5
è°¢è°¢ï¼ å¸æçæ¡ä»¤æ¨æ»¡æ
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