已知线段a和角a,求作三角形ABC,使AB=AC=a,角A=角a.作法是:1.角MAN=角________2.分别在射线AM,AN上截取AB=_______,AC=___________;3.连接________,则三角形ABC即为所求的三角形.
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![已知线段a和角a,求作三角形ABC,使AB=AC=a,角A=角a.作法是:1.角MAN=角________2.分别在射线AM,AN上截取AB=_______,AC=___________;3.连接________,则三角形ABC即为所求的三角形.](/uploads/image/z/10158281-17-1.jpg?t=%E5%B7%B2%E7%9F%A5%E7%BA%BF%E6%AE%B5a%E5%92%8C%E8%A7%92a%2C%E6%B1%82%E4%BD%9C%E4%B8%89%E8%A7%92%E5%BD%A2ABC%2C%E4%BD%BFAB%3DAC%3Da%2C%E8%A7%92A%3D%E8%A7%92a.%E4%BD%9C%E6%B3%95%E6%98%AF%3A1.%E8%A7%92MAN%3D%E8%A7%92________2.%E5%88%86%E5%88%AB%E5%9C%A8%E5%B0%84%E7%BA%BFAM%2CAN%E4%B8%8A%E6%88%AA%E5%8F%96AB%3D_______%2CAC%3D___________%3B3.%E8%BF%9E%E6%8E%A5________%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%8D%B3%E4%B8%BA%E6%89%80%E6%B1%82%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2.)
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