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常见四边形的面积

Topics in 常见四边形的面积

Numbered in the order to learn them.

  1. 面积：二维的

  2. 构造论证：直线外一点的对称点（和在线上的投影点）

  3. 检查是否点落在一条直线或曲线或平面上

  4. 链接到圆内接四边形

  5. Lines of symmetry

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