è¿æ¥BD
âµâ Aï¼45°, ADï¼4â3ï¼ ABï¼4â6
BD�0�5ï¼AB�0�5ï¼AD�0�5ï¼2ABÃADcos45°
ï¼ï¹4â6ï¹�0�5ï¼ï¹4â3ï¹�0�5ï¼2Ã4â3Ã4â6Ãï¹â2ï¼2ï¹
ï¼48
â´BDï¼4â3
â´â³ADBæ¯çè
°ç´è§ä¸è§å½¢
â´â ADBï¼90°
â´å¹³è¡å边形ABCDé¢ç§¯æ¯4â3Ã4â3ï¼96
åæ ·éç¨ä½å¼¦å®çå¯æ±ACï¼4â15
请é纳åç
温馨提示:答案为网友推荐,仅供参考