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Author:
Hyacinth Wang
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
第八周作业
異分母分數減法
球体的体积推导（优化版）
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固定周界的長方形的面積變化
函數
Proof of Pythagorean Theorem with Shearing
角的大小與角兩臂的長度有關？
橢圓1--四圓心近似法
Discover Topics
Pythagoras or Pythagorean Theorem
Pyramid
Equations
Rotation
Geometric Transformations