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å°å¦æ•°å¦. 三角形的特性 公主å²å¸‚哿°´ä¸å¿ƒæ ¡ 刘清月. 三æ¡è¾¹ç»„æˆï¼Œæ˜¯ä¸‰è§’å½¢å—. 三个角组æˆï¼Œæ˜¯ä¸‰è§’å½¢å—?. è§’. è§’. è§’. 顶点. 三角形 : 由三æ¡çº¿æ®µå›´æˆçš„图形. è¾¹. è¾¹. 三角形的边: å›´æˆä¸‰è§’å½¢çš„æ¯æ¡çº¿æ®µ. 三角形的顶点: æ¯ä¸¤æ¡çº¿æ®µçš„交点. è¾¹. 顶点. 顶点. A. C. B. 三角形 ABC. A. 高. C. B. 底. 三角形 ABC. 它们为什么è¦ç”¨ 三角形?. 三角形的稳定性. 三角形稳定性的应用. 三角形稳定性的应用.
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