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GeoGebra
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正方形雪花图案
球体的截面
双心四边形
第八周作业3
龙形曲线-分形龙
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和差角公式几何证明
面積
day01_01
How to derive the value of Pi的副本
展開圓面積 (講義版)的副本
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Perimeter
Arithmetic
Trapezoid
Ratios
Rotation