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Easter egg
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GeoGebra
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兩組對邊相等和有直角的四邊形
畫出對稱圖形
【案例】2018年全国1卷理科12题
【案例】2013年安徽高考15题
兩位數除以一位數（二）
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圓內接四邊形 ABCD ...，求 sinθ=?
凹面鏡成像
半角公式證明
test
多物件逐一動畫
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Sequences and Series
Set Theory
Vectors 3D (Three-Dimensional)
Statistics
Scalene Triangles