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Multiplication of Directed Numbers
Author:
chisunch1
GeoGebra
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算柱 (兩位數)
長方體平面投影 (Codex版)
畫出對稱圖形
近似值：有效數字
拼砌四邊形
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兩數相加
旋梯
用GeoGebra試算表模擬牛牛頓法x3
ghseh 二次函數描點法上下平移-4
诱导公式三（x轴对称关系）
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Rotation
Arithmetic
Tangent Line or Tangent
Conic Sections
Secant Line or Secant