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normal vector
Author:
Aoi Yamada
normal vector
GeoGebra
New Resources
兩位數除以一位數（二）
畫出對稱圖形
兩組對邊相等的四邊形
兩位數加法
四邉形 (四年級) 教師版
Discover Resources
不規則鑲嵌無背景 楊靜宜
GGB2
二元线性规划的图解法(习题5)
含有任意量词与存在量词的最值问题
方程001
Discover Topics
Solids or 3D Shapes
Scalene Triangles
Step Functions
Linear Functions
Conic Sections