ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ£¬Ò»¶Î½ÖµÀµÄÁ½±ßÔµËùÔÚÖ±Ïß·Ö±ðΪAB£¬PQ£¬²¢ÇÒAB¡ÎPQ£®½¨ÖþÎïµÄÒ»¶ËDEËùÔÚµÄÖ±ÏßMN¡ÍABÓÚµãM£¬½»PQÓÚµãN£®Ð¡ÁÁ´ÓʤÀû½ÖµÄA´¦£¬ÑØ×ÅAB·½Ïòǰ½ø£¬Ð¡Ã÷Ò»Ö±Õ¾ÔÚµãPµÄλÖõȺòСÁÁ£®
(1
£©ÇëÄãÔÚͼÖл³öСÁÁÇ¡ºÃÄÜ¿´¼ûСÃ÷ʱµÄÊÓÏߣ¬ÒÔ¼°´ËʱСÁÁËùÔÚλÖã¨ÓõãC±ê³ö£©£»(2
£©ÒÑÖª£ºMN=20 m£¬MD=8 m£¬PN=24 m£¬Çó£¨1£©ÖеĵãCµ½Ê¤Àû½Ö¿ÚµÄ¾àÀëCM£®![]()
´ð°¸£º
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿