如图,点D为锐角∠ABC内一点,点M在边BA上,点N在边BC上,且DM=DN,∠BMD+∠BND=180°.求证:BD平分∠ABC.-七年级数学-魔方格
来自:www.mofangge.com/html/qDetail/02/c1/201408/vudhc102745506.html
如图,点D为锐角∠ABC内一点,点M在边BA上,点N在边BC上,且DM=DN,∠BMD+∠BND=180°.求证:BD平分∠ABC.-七年级数学-魔方格
来自:www.mofangge.com/html/qDetail/02/c1/201408/vudhc102745506.html