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syps 邊長與三角形
Author:
zarachan
GeoGebra
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拼砌四邊形
四邉形 (四年級) 教師版
sanjiaohanshu
近似值：有效數字
畫出對稱圖形
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test
基測數學 100-1-33 判斷到點與到線等距的點
擴分和約分
切割正八面體
平行四邊形堆朵
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Geometric Transformations
Angles
Matrices
Symmetry
Tangent Function