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slide21
Author:
tao sun
GeoGebra
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異分母分數減法
画直线等分三角形的面积
兩組對邊相等的四邊形
球体的体积推导
四邉形 (四年級) 教師版
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Reference Angle 參考角
進出刀量測-圓形
平行四邊形堆朵
電風扇
堆疊正立方體 的複本
Discover Topics
Similar Triangles
Cone
Indefinite Integral
Linear Programming or Linear Optimization
Tangent Function