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量角器2
Author:
施重宇
GeoGebra
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【案例】2018年全国1卷理科12题
畫出對稱圖形
兩組對邊相等的四邊形
球体的体积推导（优化版）
異分母分數減法
Discover Resources
繪製常數函數圖形
test
Prism
正弦定理验证
Captain America
Discover Topics
Secant Line or Secant
Limits
Symmetry
Hyperbola
Congruence