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正方体的展开图（彩色3d版 net cube）
Author:
赵林
GeoGebra
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【案例】2018年全国1卷理科12题
圓周公式的應用
垂直線的斜率
漂亮的摇摆曲线
双心四边形
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學習單：三角形外切圓作法
Number of solutions of two straight lines
方圓之間之二
Ex5C#12
Copy of 劉徽的「割圓術」
Discover Topics
Line Segment
Percentages
Secant Line or Secant
Straight Lines
Standard Deviation