如何过任一固定点作一直线将任一三角形面积等分？注意固定点不在三角形边或角点上。？ 知乎 Sketch Coloring Page

如何过任一固定点作一直线将任一三角形面积等分？注意固定点不在三角形边或角点上。？ 知乎 Template

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如图将一副直角三角板叠在一起使直角顶点重合于点O则∠AOB ∠DOC＝ °——青夏教育精英家教�—— sketch template

2．将图1所示的三角形线直线l旋转一�可以得到如图2所示的几何体的是哪一个三角形 ——青夏教育精英家教�—— sketch template

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