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Tangent perpendicular to radius
Author:
Big Lee
GeoGebra
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【案例】2018年全国1卷理科12题
近似值：有效數字
畫出對稱圖形
兩位數除以一位數（二）
判斷球體
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線性規劃
時鐘問題
正六角柱
複利計算(1)
蜗牛壳模型
Discover Topics
Correlation
Circle
Straight Lines
Prism
Continuity