平面上有n(n>3=3)个点,任意三个点不在同一直线上,过任意三点作三角形,一共能做出多少个不同的三角形?分析:当仅有3个点时,可作()个三角形;当有4个点时,可作()个三角形.推理:.我要
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![平面上有n(n>3=3)个点,任意三个点不在同一直线上,过任意三点作三角形,一共能做出多少个不同的三角形?分析:当仅有3个点时,可作()个三角形;当有4个点时,可作()个三角形.推理:.我要](/uploads/image/z/654534-54-4.jpg?t=%E5%B9%B3%E9%9D%A2%E4%B8%8A%E6%9C%89n%28n%3E3%3D3%29%E4%B8%AA%E7%82%B9%2C%E4%BB%BB%E6%84%8F%E4%B8%89%E4%B8%AA%E7%82%B9%E4%B8%8D%E5%9C%A8%E5%90%8C%E4%B8%80%E7%9B%B4%E7%BA%BF%E4%B8%8A%2C%E8%BF%87%E4%BB%BB%E6%84%8F%E4%B8%89%E7%82%B9%E4%BD%9C%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E4%B8%80%E5%85%B1%E8%83%BD%E5%81%9A%E5%87%BA%E5%A4%9A%E5%B0%91%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%3F%E5%88%86%E6%9E%90%EF%BC%9A%E5%BD%93%E4%BB%85%E6%9C%893%E4%B8%AA%E7%82%B9%E6%97%B6%2C%E5%8F%AF%E4%BD%9C%EF%BC%88%EF%BC%89%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%EF%BC%9B%E5%BD%93%E6%9C%894%E4%B8%AA%E7%82%B9%E6%97%B6%2C%E5%8F%AF%E4%BD%9C%EF%BC%88%EF%BC%89%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2.%E6%8E%A8%E7%90%86%EF%BC%9A.%E6%88%91%E8%A6%81)
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