如图,已知△ABC,分别以AB,AC为边分别向外作等边三角形ABD和等边三角形ACE,M为AD中点,N为AE中点,P为BC中点.①如图1,∠BAC=90°时,则∠MPN=——°②如图1,∠BAC=120°时,则∠MPN=——°③如图3,若△AB
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 00:24:54
![如图,已知△ABC,分别以AB,AC为边分别向外作等边三角形ABD和等边三角形ACE,M为AD中点,N为AE中点,P为BC中点.①如图1,∠BAC=90°时,则∠MPN=——°②如图1,∠BAC=120°时,则∠MPN=——°③如图3,若△AB](/uploads/image/z/5255582-14-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E2%96%B3ABC%2C%E5%88%86%E5%88%AB%E4%BB%A5AB%2CAC%E4%B8%BA%E8%BE%B9%E5%88%86%E5%88%AB%E5%90%91%E5%A4%96%E4%BD%9C%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2ABD%E5%92%8C%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2ACE%2CM%E4%B8%BAAD%E4%B8%AD%E7%82%B9%2CN%E4%B8%BAAE%E4%B8%AD%E7%82%B9%2CP%E4%B8%BABC%E4%B8%AD%E7%82%B9.%E2%91%A0%E5%A6%82%E5%9B%BE1%2C%E2%88%A0BAC%EF%BC%9D90%C2%B0%E6%97%B6%2C%E5%88%99%E2%88%A0MPN%EF%BC%9D%E2%80%94%E2%80%94%C2%B0%E2%91%A1%E5%A6%82%E5%9B%BE1%2C%E2%88%A0BAC%EF%BC%9D120%C2%B0%E6%97%B6%2C%E5%88%99%E2%88%A0MPN%EF%BC%9D%E2%80%94%E2%80%94%C2%B0%E2%91%A2%E5%A6%82%E5%9B%BE3%2C%E8%8B%A5%E2%96%B3AB)
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