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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
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画直线等分三角形的面积
三位數除以一位數（二）
找出對稱軸
判斷球體
兩位數加法
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車輪車輪
zuiduan
對數圖形
gjc91v127 三角形旋轉
重複
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Congruence
Multiplication
Fractal Geometry
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