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conjugate
Author:
sealion1215
GeoGebra
New Resources
撒针估算面积实验
双心四边形
平行線的判定
比較五件物件的重量
第八周作业2
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橢圓
proof36 王宇揚
Copy of 閱讀鐘面及數字鐘（時和分）
moon
時距計算機
Discover Topics
Definite Integral
Polygons
Logarithmic Functions
Orthocenter
Linear Programming or Linear Optimization