å 为AB=AC=ADï¼æ以BãCãDæ¯å¨ä»¥A为åå¿ä»¥ABé¿ä¸ºåå¾çåä¸ï¼ä½ å®é
ç»åºå¾å½¢ï¼ï¼è¿æ ·ï¼é£ä¸¤ä¸ªè§å°±æ¯åå¿è§ä¸åå¨è§ä¹é´çå
³ç³»å¦
å¸æä½ èªå·±æä½ï¼å¤çå¾ï¼
追é®éº»ç¦ä½ è½ååºè¯¦ç»çè¿ç¨åï¼
追çä½ å¦ä¹ åäºåï¼å 为å©ç¨åï¼è¿ä¸ªåç´çæ¡ä»¶å°±ç¨ä¸å°äºã
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8b82b9014a90f6035dea60573712b31bb051ed4c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
å¾å½¢æç¹ä¸åç¡®