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S4E13镜面的方圆错觉
Author:
杨秀芬
GeoGebra
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sanjiaohanshu
兩位數除以一位數（一）
拼砌四邊形
小数 的副本
兩位數加法
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拋物線上的弓形區域
對稱圖形
Pentacle
數學傳播39卷4期, 平面幾何公式思考
講義/試卷 函數圖形 (雙函數)
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Linear Regression
Arithmetic Operations
Median Value
Rotation
Percentages