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proof*5 張華炘
Author:
郭亮偉
GeoGebra
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折扣
圓的切線方程
百分數及其應用
第八周作业2
常见四边形是否是双心四边形
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Angles at the same segment
長方形和正方形的面積_題A至E
分蛋糕
Copy of 閱讀鐘面及數字鐘（時和分）
探索三角形外角定理
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Rhombus
Ratios
Volume
Circle
Natural Numbers