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二面角的夹角

Author:chen-sir

Topic:Solids or 3D Shapes

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判斷球體
四邉形 (四年級) 教師版
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球

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task2
認識函數圖形
(008)80201辛宇婕
两角和的正切公式几何证明
二次函数图像描点法

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Planes
Integers
Isosceles Triangles
Conditional Probability
Trigonometric Functions

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