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Author:
Tsang Ka Chun
GeoGebra
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兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
球體建築師
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斯坦納-雷米歐司(Steiner-Lehmus)定理證明三
尺規作圖平分一個角
双曲线交抛物线
橢圓截圓錐
整数乘法演示
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Translation
Subtraction
Binomial Distribution
Linear Programming or Linear Optimization
Hyperbola