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ex 3
Author:
LAM YU SANG
GeoGebra
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直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
拼砌四邊形
小数 的副本
算柱 (兩位數)
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說明用01
線性組合2： 三角形
tetrahedron rotational symmetric
省政信箱
连续开方（制作：谢建华，修订：孟宝兴）
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Mode
Fractions
Vectors
Pie Chart or Circle Chart
Equilateral Triangles