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鏡面反射光線
Author:
紀老師
鏡面反射光線的動畫 入射角=反射角
GeoGebra
New Resources
四邉形 (四年級) 教師版
找出對稱軸
柱體建築師
画直线等分三角形的面积
兩組對邊相等的四邊形
Discover Resources
Standard Deviation (one data set) 標準差（一組數據）
Normal Vector
面積 題目2
橢圓截圓錐
HW question locus 3
Discover Topics
Terms
Equilateral Triangles
Real Numbers
Cube
Correlation