ÌâÄ¿ÄÚÈÝ
ÎÊÌ⣺Èçͼ£¬ÒªÔÚÒ»¸ö¾ØÐÎľ°åABCDÉÏÇиƴ½Ó³öÒ»¸öÔ²ÐÎ×ÀÃ棬¿ÉÔÚ¸Ãľ°åÉÏÇиî³ö°ë¾¶ÏàµÈµÄ°ëÔ²ÐÎO1ºÍ°ëÔ²ÐÎO2£¬ÆäÖÐO1¡¢O2·Ö±ðÊÇAD¡¢BCÉϵĵ㣬°ëÔ²O1·Ö±ðÓëAB¡¢BD ÏàÇУ¬°ëÔ²O2·Ö±ðÓëCD¡¢BDÏàÇУ®ÈôAB=am£¬BC=bm£¬Çó×îÖÕÆ´½Ó³ÉµÄÔ²ÐÎ×ÀÃæµÄ°ë¾¶£¨Óú¬a¡¢bµÄ´úÊýʽ±íʾ£©£®£¨1£©Çë½â¾ö¸ÃÎÊÌ⣻
£¨2£©¢ÙÏÂÃæ·½¿òÖÐÊÇСÃ÷¼òÒªµÄ½â´ð¹ý³Ì£º
½âµÃx=£®
ËùÒÔ×îÖÕÆ´½Ó³ÉµÄÔ²ÐÎ×ÀÃæµÄ°ë¾¶Îªm£®
ÀÏʦ˵£º¡°Ð¡Ã÷µÄ½â´ðÊÇ´íÎóµÄ£¡¡±ÇëÖ¸³öСÃ÷´íÎóµÄÔÒò£®
¢ÚҪʹ¢ÙÖÐСÃ÷½âµÃµÄ´ð°¸ÊÇÕýÈ·µÄ£¬a¡¢bÐèÒªÂú×ãʲôÊýÁ¿¹Øϵ£¿
¡¾´ð°¸¡¿·ÖÎö£º£¨1£©Éè°ëÔ²O2ÓëBD µÄÇеãΪE£¬Á¬½ÓO2E£¬ÔòO2E¡ÍBD£¬¸ù¾Ý¡ÏC=90°£¬µÃ³öO2E=O2C£¬DC=DE=a£¬×îºó¸ù¾ÝO2B2=BE2+O2E2£¬µÃ³ö£¨b-EO2£©2=£¨-a£©2+O2E2£¬Çó³öEO2¼´¿É£¬
£¨2£©¢ÙСÃ÷µÄ´íÎóÊÇ¡°O1O2=2x¡±£¬¢ÚҪʹСÃ÷½âµÃµÄ´ð°¸ÊÇÕýÈ·µÄ£¬¾ÍÒª°ëÔ²O1Óë°ëÔ²O2ÍâÇм´¿É
½â´ð£º½â£º£¨1£©Èçͼ£¬Éè°ëÔ²O2ÓëBD µÄÇеãΪE£¬Á¬½ÓO2E£¬ÔòO2E¡ÍBD£¬
¡ß°ëÔ²O2ÓëCD ÏàÇУ¬ÇÒ¡ÏC=90°£¬
¡àO2E=O2C£¬DC=DE=a£®
ÔÚRt¡÷BEO2ÖУ¬O2B2=BE2+O2E2£¬
¡à£¨b-EO2£©2=£¨-a£©2+O2E2£¬
½âµÃEO2=£¬
¡à×îÖÕÆ´½Ó³ÉµÄÔ²ÐÎ×ÀÃæµÄ°ë¾¶Îª=m£»
£¨2£©¢ÙСÃ÷µÄ´íÎóÊÇ°ëÔ²O1Óë°ëÔ²O2²»Äܱ£Ö¤ÍâÇУ¬¼´¡°O1O2=2x¡±ÊÇ´íÎóµÄ£¬
¢ÚҪʹСÃ÷½âµÃµÄ´ð°¸ÊÇÕýÈ·µÄ£¬¾ÍÒª°ëÔ²O1Óë°ëÔ²O2ÍâÇУ®
´Ëʱ°ëÔ²O1ÓëBD µÄÇе㡢°ëÔ²O2ÓëBDµÄÇеãÒÔ¼°O1O2ÓëBDµÄ½»µãÖغϣ®
ËùÒÔ-a=a£¬
½âµÃb=a£®
µãÆÀ£º´ËÌ⿼²éÁËÔ²µÄ×ۺϣ¬Óõ½µÄ֪ʶµãÊÇÇÐÏß³¤¶¨Àí¡¢¹´¹É¶¨Àí¡¢Ô²µÄÓйØÐÔÖÊ£¬¹Ø¼üÊÇ×ÛºÏÓ¦ÓÃÓйØÐÔÖÊÁгö¹ØÓڰ뾶µÄ·½³Ì£®
£¨2£©¢ÙСÃ÷µÄ´íÎóÊÇ¡°O1O2=2x¡±£¬¢ÚҪʹСÃ÷½âµÃµÄ´ð°¸ÊÇÕýÈ·µÄ£¬¾ÍÒª°ëÔ²O1Óë°ëÔ²O2ÍâÇм´¿É
½â´ð£º½â£º£¨1£©Èçͼ£¬Éè°ëÔ²O2ÓëBD µÄÇеãΪE£¬Á¬½ÓO2E£¬ÔòO2E¡ÍBD£¬
¡ß°ëÔ²O2ÓëCD ÏàÇУ¬ÇÒ¡ÏC=90°£¬
¡àO2E=O2C£¬DC=DE=a£®
ÔÚRt¡÷BEO2ÖУ¬O2B2=BE2+O2E2£¬
¡à£¨b-EO2£©2=£¨-a£©2+O2E2£¬
½âµÃEO2=£¬
¡à×îÖÕÆ´½Ó³ÉµÄÔ²ÐÎ×ÀÃæµÄ°ë¾¶Îª=m£»
£¨2£©¢ÙСÃ÷µÄ´íÎóÊÇ°ëÔ²O1Óë°ëÔ²O2²»Äܱ£Ö¤ÍâÇУ¬¼´¡°O1O2=2x¡±ÊÇ´íÎóµÄ£¬
¢ÚҪʹСÃ÷½âµÃµÄ´ð°¸ÊÇÕýÈ·µÄ£¬¾ÍÒª°ëÔ²O1Óë°ëÔ²O2ÍâÇУ®
´Ëʱ°ëÔ²O1ÓëBD µÄÇе㡢°ëÔ²O2ÓëBDµÄÇеãÒÔ¼°O1O2ÓëBDµÄ½»µãÖغϣ®
ËùÒÔ-a=a£¬
½âµÃb=a£®
µãÆÀ£º´ËÌ⿼²éÁËÔ²µÄ×ۺϣ¬Óõ½µÄ֪ʶµãÊÇÇÐÏß³¤¶¨Àí¡¢¹´¹É¶¨Àí¡¢Ô²µÄÓйØÐÔÖÊ£¬¹Ø¼üÊÇ×ÛºÏÓ¦ÓÃÓйØÐÔÖÊÁгö¹ØÓڰ뾶µÄ·½³Ì£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿