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樞紐定理
Author:
曾己泉
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
判斷球體
第八周作业
拼砌四邊形
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畢氏定理證明
正三角形內一點到三頂點的距離
normal vector
P6 圓周01D
点动成线
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Geometric Transformations
Derivative
Cosine
Hyperbola
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