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七巧板(底板)_李樂雯
Author:
Li Lok Man
GeoGebra
New Resources
sanjiaohanshu
四邉形 (四年級) 教師版
找出對稱軸
異分母分數減法
兩位數除以一位數（二）
Discover Resources
Polygon incised
能量守恆
畢氏定理動態證明(四塊直角三角形移動)
几何体
箭頭引導法計算文字乘以文數字
Discover Topics
Polygons
Isosceles Triangles
Cube
Stochastic Process or Random Process
Conic Sections